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C_sharp : I have run some tests on the new spatial library SqlGeography in SQL Server 2016 , which according to Microsoft should be a lot faster than the previous versions : SQL Server 2016 – It Just Runs Faster : Native Spatial Implementation ( s ) . Apply SQL Server 2016 and a breadth of methods and spatial activitie... | SqlGeography spatial operations slow - SQL Server 2016 |
C_sharp : Exhibit 1 : some code wrapping an Async ( not async ! ) network call into a TaskInstalling .Net 4.5 ( not pointing VS at it , nor recompiling ) stops this working . The callback is never invoked.Any ideas what could be causing this , and otherwise , what I can do to try and further narrow down the root cause ... | .Net 4.5 killed my TPL , now what ? |
C_sharp : I try to get a data record ID from Entity Framework : The problem is , that there is a PlantArea with the ID 0 . SingleOrDefault returns 0 , though , if it does n't find any record . So how can I differenciate between ID 0 and the case , where no data was found ? My first idea was to provide a default value -... | Define default value for SingleOrDefault Linq method |
C_sharp : Assume I have an array of bytes which are truly random ( e.g . captured from an entropy source ) . Now , I want to get a random double precision floating point value , but between the values of 0 and positive 1 ( like the Random.NextDouble ( ) function performs ) .Simply passing an array of 8 random bytes int... | Get random double ( floating point ) value from random byte array between 0 and 1 in C # ? |
C_sharp : I have a KeyPressed signal in Gtk # /mono C # for two different purposes which are not present in the default TreeView : a ) go to the next cell by pressing TAB , and b ) start editing by pressing any key.The TreeView is simple , it has a ListStore showing only rows and columns , i.e . it holds tabular data.T... | How to manage key pressings for special purposes in Gtk # TreeView ? |
C_sharp : I have a WPF application that does a lot of matching across large datasets , and currently it uses C # and LINQ to match POCOs and display in a grid . As the number of datasets included has increased , and the volume of data has increased , I 've been asked to look at performance issues . One of the assumptio... | Differences Between Output of C # Compiler and C++/CLI Compiler |
C_sharp : Say I have the following class definitions : If I would want to do the work done in DoWork ( ) , on the form , asynchronously I could add a method ( GetCalculationTask ) that returns a task using Task.Run ( ) and add a async eventhandler i.e . For a button ( MethodOne ) . Please correct me if I 'm wrong , but... | Best practice on using async / await |
C_sharp : I have following code in c # In this case I am getting 0 and 3 but in the following case I am getting 3,3 why is it so ? <code> class Test { public static int X = Y ; public static int Y = 3 ; } static void Main ( ) { Console.WriteLine ( Test.X ) ; Console.WriteLine ( Test.Y ) ; } class Test { public static i... | Static field initializers in c # |
C_sharp : I 'm trying to trim a string with String.Trim : But I 'm getting the result of : Instead of : I also tried using : But it still returns the same result.Also if I do : I get : I 'm really confused why this is happening . Could it be because the semicolon is not the last character in the string ? Here is the fu... | Why is String.Trim not trimming a semicolon ? |
C_sharp : With the new C # 8 Using Declaration Syntax , what is containing scope of a second consecutive using statement ? TL ; DRPrevious to C # 8 , having a consecutive using statement like : would expand to something like the following ( My Source ) : I know that there are two other possible expansions but they all ... | C # 8 Using Declaration Scope Confusion |
C_sharp : Short and simple . Does the new string interpolation in C # 6.0 rely on reflection ? I.e . doesuse reflection at runtime to find the variable `` name '' and its value ? <code> string myStr = $ '' Hi { name } , how are you ? `` ; | Does C # 6.0 's String interpolation rely on Reflection ? |
C_sharp : When I use Entity Framework against a SQL table , it only refers to the necessary columns in the generated SQL : becomesHowever , if I make an analogous query against a SQL view , Entity Framework generates SQL referring to every column in the view : becomesI 'm sure SQL Server will perform its own optimizati... | Entity Framework selects too many columns in views |
C_sharp : Quick Question , See this code : And : Why result.Add ( value ) not executed ? However this not executed , Another question that is have a way do a foreach on a IEnumerable with Extention Method ? Except this way : IEnumerable.ToList ( ) .Foreach ( p= > ... ) <code> List < int > result = new List < int > ( ) ... | Foreach with Extension Method on IEnumerable |
C_sharp : This works perfectly.. This returns a compiler error ... Same happen when using reflection ... So , does somebody know why the enum-base is just an integral-type ? <code> public enum NodeType : byte { Search , Analysis , Output , Input , Audio , Movement } public enum NodeType : Byte { Search , Analysis , Out... | Why can you use just the alias to declare a enum and not the .NET type ? |
C_sharp : I came across this line of code in a book : This sort of thing seems like tail-chasing to me ... Why is the c = > c. necessary ? Would n't the following be understandable ( by the compiler , and even more so by humans ) ? I 'm sure there 's all kinds of fancy stuff going on behind the scenes that purportedly ... | Why do lambdas require = > as part of their syntax ? |
C_sharp : Recently I moved from VB to C # , so I often use a C # to VB.NET converter to understand syntax differences.While moving next method to VB I noticed an interesting thing.C # original code : VB.NET result : C # 's ++ operator replaced with System.Threading.Interlocked.IncrementDoes it mean that not threadsafe ... | Does C # ++ operator become threadsafe in foreach loop ? |
C_sharp : I know how to use locks in my app , but there still few things that I do n't quite understand about locking ( BTW - I know that the lock statement is just a shorthand notation for working with Monitor class type ) .From http : //msdn.microsoft.com/en-us/library/ms173179.aspx : The argument provided to the loc... | Few confusing things about locks |
C_sharp : I find myself quite often in the following situation : I have a user control which is bound to some data . Whenever the control is updated , the underlying data is updated . Whenever the underlying data is updated , the control is updated . So it 's quite easy to get stuck in a never ending loop of updates ( ... | Event circularity |
C_sharp : I need an idea how to do the following animation idea . Lets assume I have a view model defined as such : The IPage object is , plainly spoken , a piece of paper with the title and the description written on it . When the IPage object changes in my view model I want to have an animation as outlined below : Th... | WPF animation idea for flipping a page |
C_sharp : I was tasked with converting a solution from VB to C # . There were 22 projects and hundreds of classes , so I decided to research converters . I finally settled on SharpDevelop , which is an IDE with an included converter . I ran it on each of my projects , and have plenty of errors to fix , but I should be ... | Converting from VB to C # |
C_sharp : I have list object 's . But it has duplicate records for 2 key - itemId and itemTypeId . How do I remove duplicates from the list ? I tried GroupBy - but it can only use one key at a time.Actual Result : to1 and to3 <code> public class TestObject { public string Name ; public int itemTypeId ; public int itemI... | How to remove duplicate object in List with double key |
C_sharp : I have two methods ( in C # ) : These operations have no common objects ( aside from the pizzas that are passed from one to the other ) , and are thread-safe . They each take several seconds to execute and they each use different resources ( oven vs car ) . As such , I want to run them at the same time.How do... | Pizza , Threading , Waiting , Notifying . What does it mean ? |
C_sharp : I was writing some unit tests for a utility library when I came across a test I would expect to fail that actually passed . The issue is related to comparing two float variables , versus comparing one float ? and one float variable.I 'm using the latest versions of both NUnit ( 2.6.0.12051 ) and FluentAsserti... | Is this a bug when comparing a nullable type with its underlying type using FluentAssertions ? |
C_sharp : I have a list of prime numbers up to 2 000 000 . That 's a list containing almost 150 000 very large integers . I want a sum of all the numbers in it . Here 's a random list of large integers just for demonstration : I 'm getting a `` Arithmetic operation resulted in an overflow '' exception . I guess the sum... | List sum too large , throwing overflow exception |
C_sharp : I 'm using an ActiveDirectory server to query the groups that a user belongs to . I would like to get all the groups that a user belongs to , but using the Network Management funcions of the Network API.I realized that already exist a function called NetUserGetGroups , but unfortunately , this function does n... | How to get user 's groups using the Network API |
C_sharp : I 'm creating a chain of responsibility pipeline using System.Func < T , T > where each function in the pipeline holds a reference to the next.When building the pipeline , I 'm unable to pass the inner function by reference as it throws a StackOverflowException due to the reassignment of the pipeline function... | Chain of responsibility using Func |
C_sharp : Hi lets say i have tree of following typelets say root of the tree is I know it is possible to check length of this tree using recursionbut is this possible to check length of this tree using linq ? <code> public class Element { public List < Element > element ; } Element root = GetTree ( ) ; | Checking length of tree using linq |
C_sharp : I 'm trying to create a binding from code in a library that targets multiple frameworks ( WPF , WinRT , UWP etc ) , and I 'm hitting a brick wall . The property I 'm trying to bind to is a custom attached property . In WPF , I can pass the DependencyProperty itself as the binding path : But in WinRT the Prope... | Binding from code to a custom attached property in WinRT/UWP |
C_sharp : I am new to MVC and started with MVC 4 . I want to make an online shop application.-Same shopping logic will be used by two different web sites/domains.-And the views must alter according to domain name and their mobile versions.Logic file structe is like this : View file structure for first domain : View fil... | MVC 4 same logic with different view folders |
C_sharp : We are using System.Linq.Expressions.Expression to build custom expressions which are applied on the .Where ( ) of our IQueryable.What I want to achieve is , to apply the .HasFlag ( ) method ( introduced in EF 6.1 ) on the property which is then used in the .Where ( ) expression.I have following code : The va... | LINQ to Entities does not recognize the method 'Boolean HasFlag ( System.Enum ) ' when creating the expression via System.Linq.Expressions.Expression |
C_sharp : According to MSDN , Environment.StackTrace can throw ArgumentOutOfRangeException but I do n't understand how this is possible.Environment.cs StackTrace ( source ) Calls GetStackTrace ( Exception , bool ) where Exception is null.Environment.cs GetStackTrace ( Exception , bool ) ( source ) ( comments removed , ... | How can Environment.StackTrace throw ArgumentOutOfRangeException ? |
C_sharp : I 'm implementing some real-time charts in a C # WPF application , but am using WinForms charts as they are generally easy to work with and are surprisingly performant.Anyway , I 've got the charts working just fine except for one major issue which I ca n't for the life of me figure out : When I add data to t... | How to cure C # winforms chart of the wiggles ? |
C_sharp : It is possible to register dependencies manually : When there are too much dependencies , it becomes difficult to register all dependencies manually.What is the best way to implement a convention based binding in MVC 6 ( beta 7 ) ? P.S . In previous projects I used Ninject with ninject.extensions.conventions ... | Convention based binding in ASP.NET 5 / MVC 6 |
C_sharp : WCF makes it easy to call services synchronously or asynchronously , regardless of how the service is implemented . To accommodate clients using ChannelFactory , services can even define separate sync/async contract interfaces . For example : This allows the client to reference either contract version , and W... | Unit-test WCF contracts match for sync / async ? |
C_sharp : I have been handing the closing and aborting of channels this way : Assume only a single thread uses the channel . How do we know the channel will not fault right after checking the state ? If such a thing were to happen , the code would try to Close ( ) and Close ( ) will throw an exception in the finally bl... | Is it possible for a WCF channel to fault right after checking the state ( single thread ) ? |
C_sharp : How would you create a Class that whichever class extends the Class , methods are automatically invoked/called . Just edit my question if it sounds misleading . I 'll just showcase some samplesExample 1 : In unity when you extend monobehavior your methods are automatically called . I do n't know if I 'm right... | Calling methods from a super class when a subclass is instantiated |
C_sharp : I have the following code which is in a transaction . I 'm not sure where/when I should be commiting my unit of work.On purpose , I 've not mentioned what type of Respoistory i 'm using - eg . Linq-To-Sql , Entity Framework 4 , NHibernate , etc.If someone knows where , can they please explain WHY they have sa... | At which line in the following code should I commit my unit of work ? |
C_sharp : Given the following method : This works if I call it passing a array of strings : But will not work if I call it using string arguments : I understand that the compiler will wrap Michael and Jordan on an array , so should n't the results be the same on both cases ? <code> static void ChangeArray ( params stri... | C # Inconsistent results using params keyword |
C_sharp : I was just looking at the question `` SubQuery using Lambda Expression '' and wondered about compiler optimization of Linq predicates.Suppose I had a List < string > called names , and I was looking for the items with the shortest string length . So we have the query names.Where ( x = > x.Length == names.Min ... | In a Linq predicate , will the compiler optimize a `` scalar '' call to Enumerable.Min ( ) or will it be called for each item ? |
C_sharp : I have two questions : Question 1 Background : I noticed when looking at the implementation of 'AsEnumerable ( ) ' method in LINQ from Microsoft , which was : Question 1 : I was expecting some kind of casting or something here , but it simply returns the value it was passed . How does this work ? Question 2/3... | Internal Implementation of AsEnumerable ( ) in LINQ |
C_sharp : I have a problem with writing a C # linq query for retrieving data from the database , based on multiple columns of a filter list.The list of items contains multiple columns ( For example A and B ) and is dynamic.My first idea was to write an any statement in an where statement , but this is not allowed in EF... | Retrieve records from the database matching multiple values of a list |
C_sharp : I am drawing a header for a timeline control.It looks like this : I go to 0.01 millisecond per line , so for a 10 minute timeline I am looking at drawing 60000 lines + 6000 labels.This takes a while , ~10 seconds.I would like to offload this from the UI thread.My code is currently : I had looked into Backgrou... | 10000's+ UI elements , bind or draw ? |
C_sharp : In unity3D I am creating and destroying capsule dynamically at run-time . I used space to create capsule and C for destroying.I want create multiple object and destroy multiple object at time . When I pressed Space multiple times object is creating multiple time it fine . But the problem is when I pressed C m... | How to Destroy multiple gameObject at runtime ? |
C_sharp : This is a question I was asked at my interview recently : Which 'Random ' object ( s ) would get collected during the 'GC.Collect ( ) ' call ? I answered that this is an implementation-specific question and it highly depends on the GC implementation and the corresponding weak reference semantics . As far as I... | Which of these objects are eligible for garbage collection ? |
C_sharp : Lets say I have a function that needs to return some integer value . but it can also fail , and I need to know when it does.Which is the better way ? orthis is probably more of a style question , but I 'm still curious which option people would take.Edit : clarification , this code talks to a black box ( lets... | which is better , using a nullable or a boolean return+out parameter |
C_sharp : I have an application that needs to take in several million char* 's as an input parameter ( typically strings less than 512 characters ( in unicode ) ) , and convert and store them as .net strings.It turning out to be a real bottleneck in the performance of my application . I 'm wondering if there 's some de... | Optimizing several million char* to string conversions |
C_sharp : I 'm having trouble serialising and de-serialising NodaTime 's LocalTime through a WebAPI.Class definitionTry to serialize the outputI want to time format formatted to a ISO like standard e.g . 12:34:53 , but instead it de-serialisers to the following with local time represented as ticks ; { `` ExampleLocalTi... | Proper serialization of LocalTime through WebAPI |
C_sharp : Somebody gives me a type t.I 'd like to know if that type is an enumeration or not . <code> public bool IsEnumeration ( Type t ) { // Mystery Code . throw new NotImplementedException ( ) ; } public void IsEnumerationChecker ( ) { Assert.IsTrue ( IsEnumeration ( typeof ( Color ) ) ) ; Assert.IsFalse ( IsEnumer... | Is there any way to check that a type is a type of enumeration ? |
C_sharp : I am getting all events , with a certain attribute , and I want to modify these events adding a call to another method.What I want is basically what is commented above . `` Modify '' the subscribed methods of the event . I guess I ca n't subscribe to it , because I need to pass the parameters the method is pa... | How can I change a method assigned on an event ? |
C_sharp : I would like to parse an input string that contains either a time , a date and time , or just a date , and I need to know which parts where included in the input string.Parsing the actual values is not a problem : These all successfully parse as you 'd expect.However , if the date element is not provided , Da... | Parsing Time , Date/Time , or Date |
C_sharp : EDIT 1 : I know there are alternatives such as telescoping , this was a purely educational question.I know that this is true , but why must it be ? It seems like with something like this : The compiler could change the method to something like this : Why would n't that work , or would it , and it 's just a de... | Why must default method parameters be compile-time constants in C # |
C_sharp : I 'm trying to create several enums as such , that gives the syntax of Dropdown.Category.Subcategory . However , I have been reading that this is n't such a good idea . My choice for this was mostly because I could n't think of any other way to select different enum values depending on the choice of the categ... | Alternative to nesting enums |
C_sharp : If I have two yield return methods with the same signature , the compiler does not seem to be recognizing them to be similar.I have two yield return methods like this : With this , I would expect the following statement to compile fine : Func < int , IEnumerable < int > > generator = 1 == 0 ? EvenNumbers : Od... | C # compiler not recognizing yield return methods as similar ? |
C_sharp : I 'm trying to create a set of C # classes that I can schedule to run at a future time . The intention is to programmatically schedule these via other parts of my code.This is the current class I 'm trying to call via COM.Here 's how I 'm attempting to schedule the taskMicrosoft.Win32.TaskScheduler is version... | Unable to register a COM object for usage in a scheduled task |
C_sharp : PreambleI have been investigating a concept and what I am posting below is a cut down version of what I have been trying . If you look at it and think `` That does n't make any sense to do it that way '' then it is probably because I does n't make any sense - there may be more efficient ways of doing this . I... | SQL ORDER BY within OVER clause incompatible with CLR aggregation ? |
C_sharp : Consider the following codeSteps to reproducePut a breakpoint on Console.Read ( ) ; Run to breakpointInspect count++ ( should display 0 ) Inspect values2 and populate the Results ViewInspect count++ ( should display 100 ) ProblemGiven that I have only taken 50 items from values1 , I would expect count++ to di... | LINQ projection ( Select ) returning an odd result |
C_sharp : I 've read that it is usually bad practice to extend System.Object , which I do agree with.I am curious , however , if the following would be considered a useful extension method , or is it still bad practice ? It is similar to extending System.Object but not exactly , This essentially allows any object to in... | Extension method that extends T - bad practice ? |
C_sharp : When I bump my mousewheel , my WPF application crashes sometimes , with an OverflowException . Here 's the start of the stack trace : From that , I 've traced it down to the WindowChrome - I can even reproduce it with just the WindowChrome . But it seems like it has to be fullscreen . What 's going on here ? ... | Why does my WPF application crash when I bump my mousewheel ? |
C_sharp : I 'm having trouble understanding why arrays in C # are covariant and what benefits this covariance can bring . Consider the following trivial code example : This code will compile okay , but will unceremoniously and perhaps unsurprisingly explode at runtime.If I try to attempt this same thing using generics ... | Why are C # arrays covariant and what benefits does it bring ? |
C_sharp : If I have a synchronous method `` GetStrings ( ) '' : ( which itself calls async method `` GetString ( ) '' ) And I call this synchronous `` GetStrings ( ) '' method from an async method : What would be the behavioural difference , if GetStrings ( ) was actually async ? ( and performed an await on the Task.Wh... | What happens when you await a synchronous method |
C_sharp : Hi i have two Writablebitmap , one from jpg and another from png and use this method to mix color in a loop : My problem is in alpha channel , my watermark effect result is bad ( quality ) ! This is the original png.This is the original jpg.Any Help ? <code> private static Color Mix ( Color from , Color to , ... | Png over jpeg ( water mark effect ) bad quality ? |
C_sharp : In C # I have ( saw with Visual Studio watch tool ) : And in C++ : Why are the values not the same ? And how can I get -3.40282347E+38 ( C # value ) in C++ ? <code> float.MinValue = -3.40282347E+38 std : :numeric_limits < float > : :min ( ) = 1.17549435e-038 | Why is float.min different between C++ and C # ? |
C_sharp : Given the following code , Resharper will correctly warn me about a possible NullReferenceException on foo.Bar because there could be null elements in the enumerable : One way to satisfy the static analyzer is to explicitly exclude nulls : I find myself typing .Where ( x = > x ! = null ) a lot , so I wrapped ... | How do I tell Resharper that my IEnumerable method removes nulls ? |
C_sharp : I recently came across what seems to puzzle my logic of maths in a piece of codeFor some reason , C # is claiming that this is false but if one were to think logically , 0.123 is larger than 0.Is there any reason that it is claiming that 0.123 is smaller than 0 ? I have read that there will be a comparison is... | if ( ( 123 / 1000 ) > 0 ) returns false |
C_sharp : There are two Point3D 's ( A and B ) and I want to calculate the points of a cuboid ( a , b , c ... h ) surrounding the line between A and B like a hull : There is one degree of freedom , the angle of the cuboid , because it can rotate around the line AB . I am not sure yet if this is a problem.I tried to cal... | Calculating the Point3Ds of a Cuboid around a Line |
C_sharp : i use the httpclient from Microsoft.Net.Http ( version 2.2.22 ) to request some of my mvc pages.My page returns a HttpStatusCodeResult like : With the httpclient it is not problem to call the page . But i could n't find a way to access the statusDescription ( `` Blub Blub '' ) . Is there a way to access the d... | HttpClient StatusDescription is missing |
C_sharp : I found this explanation and solution for using Dapper to search a VARCHAR field using a string as input : Source : Dapper and varcharsBut is there a way to adapt this to do the DbString conversion for every item in a list ( using an IN clause ) ? The query I am trying to run looks like this : Unfortunately ,... | How do I tell Dapper to use varchar for a list of params in a `` WHERE '' clause that uses `` IN '' ? |
C_sharp : What are some good ways to handle known errors that occur in a method ? Let 's take a user registration method as an example . When a user is signing up , a method SignUp ( User user ) is called . There are a few known errors that might happen.Email is already registeredUsername is already registeredEtcYou co... | Handling Known Errors and Error Messages in a Method |
C_sharp : I 've been having really bad memory problems with an ASP.NET Application . It seems as if every time the page loads , the old previous instance of the page is not removed from memory . If you press F5 ten times , the memory adds 10-20MB to the instance . During Stress and performance testing , this would max ... | ASP.NET Pages not removed from memory |
C_sharp : I wan na select some records from the informix database via Odbc connection and insert them to a Sql database table.I 've searched regrading that , but they did n't solve my issue . Is it possible to have both connections at one place ? Any help or suggestions would be appreciated . Thanks <code> INSERT INTO ... | Odbc & Sql connection in one query |
C_sharp : I wrote User Control ( yay ! ) . But I want it to behave as a container . But wait ! I know about Trick . The problem is - I do n't want all of my control to behave like container , but only one part . One - de facto - panel ; ) To give wider context : I wrote a control that has Grid , some common buttons , l... | UserControl with header and content - Allow dropping controls in content panel and Prevent dropping controls in header at design time |
C_sharp : I was fiddling around with parsing in C # and found that for every string I tried , string.StartsWith ( `` \u2D2D '' ) will return true . Why is that ? It seems it works with every char . Tried this code with .Net 4.5 the Debugger did not break . <code> for ( char i = char.MinValue ; i < char.MaxValue ; i++ )... | Why does string.StartsWith ( `` \u2D2D '' ) always return true ? |
C_sharp : I am currently working on a C # .NET Add-In for Microsoft Outlook.The goal of the Add-In is , to capture the search input from the Outlook Instant Search , and show in a Custom Pane my own search results.It works pretty well , and with subclassing the Outlook Window with a Native Window , I get the search str... | Native Window : Release Handle On Close |
C_sharp : This compiles correctly in C # 7.3 ( Framework 4.8 ) : I know that this is syntactic sugar for the following , which also compiles correctly : So , it appears that ValueTuples can be assigned covariantly , which is awesome ! Unfortunately , I do n't understand why : I was under the impression that C # only su... | What makes ValueTuple covariant ? |
C_sharp : I have encountered a problem while using Invariants with Code Contracts . I want to define an Invariant within my abstract class but it is simply ignored . The code below shows my interface and the abstract class.Afterwards , I implement this interface within my Point class and create an object from it . This... | Code Contracts : Invariants in abstract class |
C_sharp : Would it be considered bad practice to have a viewmodel that has a property of another view model ? ... as in : EDITA little more about my particular situation : I have a view model that currently contains 2 domain classes . I pass this viewmodel to a view that loads 2 partials views ( one for each domain cla... | Is it bad practice to have a ViewModel with a property typed as another ViewModel in ASP.NET MVC |
C_sharp : I have some code that was recently upgraded from EF 4.2 to EF 5.0 ( actually EF 4.4 since I am running on .Net 4.0 ) . I have discovered that I had to change the syntax of my query , and I 'm curious as to why . Let me start off with the problem.I have an EventLog table that is populated by the client periodi... | Why does EF 5.0 not support this EF 4.x LINQ syntax when compiling to sql ? |
C_sharp : Let 's say , hypothetically ( read : I do n't think I actually need this , but I am curious as the idea popped into my head ) , one wanted an array of memory set aside locally on the stack , not on the heap . For instance , something like this : I 'm guessing the answer is no . All I 've been able to find is ... | Are stack based arrays possible in C # ? |
C_sharp : Let 's assume I have a class that has a property of type Dictionary < string , string > , that may be null.This compiles but the call to TryGetValue ( ) could throw at a NullRef exception at runtime : So I 'm adding a null-propagating operator to guard against nulls , but this does n't compile : Is there an a... | Null propagation operator , out parameters and false compiler errors ? |
C_sharp : My test code : My problem is : I can not directly declare pictureUrl like this : I 've tried to do that , it threw me error message : 'Task < UserProfileViewModels > ' does not contain a definition for 'PictureUrl ' and no extension method 'PictureUrl ' accepting a first argument of type 'Task < UserProfileVi... | Why can not I directly access property `` .SingleAsync ( ) .Property '' ? |
C_sharp : I am creating ( then altering ) a bitmap using `` unsafe '' code in a C # winforms project . This is done every 30ms or so . The problem I 'm having is that `` noise '' or random pixels will show up sometimes in the resulting bitmap where I did not specifically change anything.For example , I create a bitmap ... | How to avoid `` noise '' when setting pixels of image in unsafe code |
C_sharp : This is very baffling to me . Somehow the IndexOf ( string ) method of my List < string > object is returning -1 even though the value is CLEARLY in the List.string prefix is `` 01 '' validPrefixes index 0 is `` 01 '' .indexOf is -1 . Umm ... How ? <code> protected readonly List < string > validPrefixes = new... | List < string > object IndexOf returning -1 . How ? |
C_sharp : I have a situation where I have a simple , immutable value type : When I box an instance of this value type , I would normally expect that whatever it is that I boxed would come out the same when I do an unbox . To my big suprise this is not the case . Using Reflection someone may easily modify my box 's memo... | Why does the CLR allow mutating boxed immutable value types ? |
C_sharp : Given a set of sixteen letters and an English dictionary file , need to find a solution where those sixteen letters can fit into a 4x4 grid so that a valid word can be read across each row , and down each column.My current solution:1 ) Get a list of all of the possible 4-letter words that can be made with tho... | My iteration is taking forever . Looking for a better way |
C_sharp : I wrote the following console app to test static properties : As this console app demonstrates , the MyProperty property exists once for all instances of BaseClass . Is there a pattern to use which would allow me to define a static property which will have allocated storage for each sub-class type ? Given the... | What is the best way to define a static property which is defined once per sub-class ? |
C_sharp : I am using application insights sdk for a wpf app I 've been working on to capture some simple telemetry . I am loading the configuration file that looks like thisThe problem is when I run the installed application and am offline the telemetry is captured just fine . Next time I open the app when I 'm online ... | App Insights Telemetry not sending when offline |
C_sharp : I am trying to develop an algorithm in C # that can take an array list of URL 's and output them in an outline numbered list.As you can imagine I need some help . Does anyone have any suggestions on the logic to use to generate this list ? Example Output : ... and so on <code> 1 - http : //www.example.com/abo... | c # outline numbering |
C_sharp : I have function which serialize objects . It is working fine in every case except when I run with specific object . This is object of class which contains Tasks . But I do n't see why would this be problem.In debug mode code is just stuck without any error , or any exception . Just stop and waiting for ever.A... | SerializeObject is waiting for ever |
C_sharp : I have this code ( the unimportant details are that it runs on EC2 instances in AWS , processing messages on an SQS queue ) .The first statement in the method gets some data over http , the second statement saves state to a local dynamo data store.The performance characteristics are that the http round trip t... | Should I make a fast operation async if the method is already async |
C_sharp : Our code base has a lot of StringBuilder.AppendFormats that have strings that end with newline characters . I 've made an extension method called AppendLineFormat and would like to use Resharper 's Custom Patterns feature to identify and fix those old calls to use the new extension method ( and to suggest thi... | Can I use regex to find strings in Resharper 's Custom Patterns ? |
C_sharp : I have a VC++ COM component with a type library . The type library of this component declares an interface and a co-class : In order to consume the component from a C # application I add a reference to the C # project and an interop assembly is generated.In the Object Browser of Visual Studio 2003 I see that ... | Names in the interop assembly have wrong capitalization |
C_sharp : My Application can perform 5 business functions . I now have a requirement to build this into the licensing model for the application.My idea is to ship a `` keyfile '' with the application . The file should contain some encrypted data about which functions are enabled in the application and which are not . I... | How can I secure an `` enabled functions '' license file for my program ? |
C_sharp : Good day ! I allow my content editors to store CSS as very basic components ( usually containing a single , multi-line field called `` code '' that they paste into ) , and these are then added as Component Presentations into a Page with a .css file extension . When creating the page , users are able to set a ... | Tridion 2011 : Changing a page 's file name as it 's being published |
C_sharp : I found this bit of code that computes Levenshtein 's distance between an answer and a guess : But I need a way to do a count for the amount of times each error occurs . Is there an easy way to implement that ? <code> int CheckErrors ( string Answer , string Guess ) { int [ , ] d = new int [ Answer.Length + 1... | Levenshtein distance c # count error type |
C_sharp : I have the following code : I want to write one function that will properly trim the fields , something like : Of course , this is not permitted in C # .One option I have is to write a helper and use reflection.Is there another way I can achieve this ( reflecting on so many properties will deffinitely have a ... | Modify multiple string fields |
C_sharp : I was writing some code today and was mid line when I alt-tabbed away to a screen on my other monitor to check something . When I looked back , ReSharper had colored the 3rd line below grey with the note `` Value assigned is not used in any execution path '' . I was confused ; surely this code ca n't compile ... | Why is `` someString += AnotherString = someString ; '' valid in C # |
C_sharp : If JavaScript 's Number and C # 's double are specified the same ( IEEE 754 ) , why are numbers with many significant digits handled differently ? I am not concerned with the fact that IEEE 754 can not represent the number 1234123412341234123 . I am concerned with the fact that the two implementations do not ... | Why are numbers with many significant digits handled differently in C # and JavaScript ? |
C_sharp : I need to replace some parts of a string with each other using C # .I could find only one similar question about how to achive this here but it was PHP.My situation involves a Dictionary [ string , string ] which holds pairs to replace like : dog , cat cat , mouse , mouse , raptorAnd I have a string with the ... | How to replace two or more strings with each other ? |
C_sharp : The following code finds instances of the word `` Family '' in a Word document . It selects and deletes the instances . The code works fine , but I want to find all instances of only highlighted words . <code> public void FindHighlightedText ( ) { const string filePath = `` D : \\COM16_Duke Energy.doc '' ; va... | Find highlighted text |
C_sharp : I have an int array in one dimension : and I want to convert it to two dimensions , such as : How do I achieve this with C # ? <code> var intArray=new [ ] { 1 , 2 , 3 , 4 , 5 , 6 } ; var intArray2D=new [ , ] { { 1 , 2 } , { 3 , 4 } , { 5 , 6 } } ; | How to Convert int [ ] to int [ , ] - C # |
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