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C_sharp : I 'm a student and i 'm new around here . I have a course project to make a Paint-like program . I have a base class Shape with DrawSelf , Contains ect . methods and classes for Rectangle , Ellipse and Triangle for now . Also i have two other classed DisplayProccesor which is class for drawing , and DialogPro... | When rotating shape , it stays together with the rotated one |
C_sharp : On my production server I have set environment variable by adding the following to /etc/environment : I checked it has recorded with printenv ASPNETCORE_ENVIRONMENT after a reboot.My server is Ubuntu 14.04 and I am using asp.net core 1.1.It is loading my appsettings.Development.json instead of appsettings.Pro... | Ca n't set production server to production |
C_sharp : Is it true that if i use the following , it will take less resources and the cleanup will be faster ? as compared to : <code> using ( TextReader readLogs = File.OpenText ( `` C : \\FlashAuto\\Temp\\log.txt '' ) ) { //my stuff } TextReader readLogs = new StreamReader ( `` C : \\FlashAuto\\Temp\\log.txt '' ) ; ... | using keyword takes less space ? |
C_sharp : There are several options when one class must have a container ( collection ) of some sort of objects and I was wondering what implementation I shall prefer.Here follow the options I found : Pros : AClass is not dependent on a concrete implementation of a collection ( in this case List ) .Cons : AClass does n... | Having a collection in class |
C_sharp : We have a problem with AppFabric that is causing the below error to occur : This error happens infrequently in our test environment ( we have not found a scenario to reproduce the issue on demand ) , but seems to always happen in our production environment just after each deployment . Our deployments are auto... | AppFabric CreateRoutingClient Error |
C_sharp : I have IdentityServer4 with Angular . Every 5 minutes the token is silent refreshed . But after 30minutes the user is automatically logged out . I was trying to set lifetime cookies somehow , without any success . This is my current configuration : @ EDITIf I will addThen it working fine , but I bet this is n... | IdentityServer4 automatically logout after 30 minutes |
C_sharp : Hey , I 'm self-learning about bitwise , and I saw somewhere in the internet that arithmetic shift ( > > ) by one halfs a number . I wanted to test it : Another Example : Thanks . <code> 44 > > 1 returns 22 , ok22 > > 1 returns 11 , ok11 > > 1 returns 5 , and not 5.5 , why ? 255 > > 1 returns 127127 > > 1 ret... | Why arithmetic shift halfs a number only in SOME incidents ? |
C_sharp : I have a .NET Core worker project and want to add a library providing several HTTP endpoints . I have to stay with the worker project , I ca n't change it to a Web API project . What I have done so far : I created a worker projectI created a library projectI added a reference to the library in the worker proj... | register Web API controller from class library |
C_sharp : I am trying to convert the ffg : ,This Worksinto this , which does not work , It gives me an error that it can not find `` COLUMNS '' .While debugging , it seems that rs is picking up all the return methods and private variables in the SELECT class it just is not picking up the method like COLUMNS in the SELE... | Dynamic object not showing its methods |
C_sharp : I work in C # , so I 've posted this under C # although this may be a question that can be answered in any programming language.Sometimes I will create a method that will do something such as log a user into a website . Often times I return a boolean from the method , but this often causes problems because a ... | Methods that return meaningful return values |
C_sharp : Consider the following code : I 'm trying to keep an instance of a generic class in a property for later usage , but as you know : Properties , events , constructors etc ca n't be generic - only methods and types can be generic . Most of the time that 's not a problem , but I agree that sometimes it 's a pain... | Using dynamic type instead of none-possible generic properties |
C_sharp : How does the compiler handle interpolated strings without an expressions ? Will it still try to format the string ? How does the compiled code differ from that of one with an expression ? <code> string output = $ '' Hello World '' ; | How does C # string interpolation without an expression compile ? |
C_sharp : Anyone have any ideas why this does n't work ( C # or VB.NET or other .NET language does n't matter ) . This is a very simplified example of my problem ( sorry for VB.NET ) : If you do : You will be surprised at the result . It will print `` Nothing '' . Anyone have any idea why it does n't print `` Something... | Interesting Property Behavior |
C_sharp : Say I have a rather expensive assertion : If I test this assertion with : Will IsCompatible be executed in release builds ? My understanding is that Debug.Assert being marked as [ Conditional ( `` DEBUG '' ) ] , calls to it will only be emitted in debug builds . I 'm thinking that this wo n't prevent the expr... | Will the expression provided to Debug.Assert be evaluated in a release build ? |
C_sharp : This code fails only in Release mode at Assert.Fail ( ) line despite the fact relay variable is still in scope and thus we still have strong reference to the instance , so WeakReference must not be dead yet.UPD : To clarify a bit : I realize that it can be 'optimized away ' . But depending on this optimizatio... | Is it really a bug in JIT optimization or am I missing something ? |
C_sharp : There are multiple questions ( 1,2,3,4 etc . etc . ) called `` Why is n't this exception caught '' . Sadly , none of these solutions work for me ... So I am stuck with a truly uncatchable exception.I have a piece of code ( .NET 4.0 ) that checks a large textfile for digits and numbers . Whilst testing I got a... | Moby Dick of exceptions |
C_sharp : I 'm new to C # and working on a snake project . I 'm trying to make it rainbow coloured , is there a better way to switch between six colours and then repeat ? Any suggestions ? <code> public Brush Colour ( int i ) { Brush snakeColour ; switch ( i ) { case 0 : case 6 : case 12 : case 18 : case 24 : snakeColo... | Better way to switch Brush colours ? |
C_sharp : When using extremely short-lived objects that I only need to call one method on , I 'm inclined to chain the method call directly to new . A very common example of this is something like the following : The point here is that I have no need for the Regex object after I 've done the one replacement , and I lik... | Any reason not to use ` new object ( ) .foo ( ) ` ? |
C_sharp : Compiler warning CS4014 ( calling async method without awaiting result ) is not emitted as a warning during build when the called method is in a referenced assembly.When the called method is in the same assembly the warning is correctly emitted.The compiler warning is signaled in Visual Studio when both proje... | Compiler warning CS4014 not emitted during build |
C_sharp : Most of the Q & A I found on StackOverflow is how Binding work but x : Bind does n't which usually solved by Bindings.Update ( ) . However , my issue is , inside a GridView , ItemSource= '' { x : Bind _myList } '' works but ItemSource= '' { Binding _myList } '' does n't . Why ? And how do I make Binding work ... | x : Bind works but Binding does n't ( opposite to most Q & A found ) |
C_sharp : If you compile the following code : And then decompile it ( I used dotPeek ) and examine the all-important MoveNext method , you will see a bool variable declared near the beginning ; dotPeek chose `` flag '' for me.In this case , you will see one subsequent consumer of that variable , in the default case sta... | Why does a bool `` flag '' get generated for the async/await state machine ? |
C_sharp : First , I apologize if this is not an appropriate venue to ask this question , but I was n't really sure where else to get input from.I have created an early version of a .NET object persistence library . Its features are : A very simple interface for persistence of POCOs.The main thing : support for just abo... | Is my idea for an object persistence library useful ? |
C_sharp : I am trying to write a code generator using a c # console application . Now when I type this , I receive an error : It says `` input in wrong format '' I have checked that all the variables were strings , and they are . When I tried It worked perfectly fine . Is there a way to fix this ? <code> Console.WriteL... | Writing scope ( { ) into string in console app |
C_sharp : Today , I was doing some tests in .NET Core , and I have come across some interesting thing.Before ( ~ .NET Framework 4 ) , Random used Environment.TickCount , but now I believe this has changed.Consider the following code : In older .NET Framework versions , the new Random ( ) empty constructor would use Env... | Did Microsoft change Random default seed ? |
C_sharp : I was playing around with the C # compiler on TryRoslyn recently , and I came across a strange problem where an inequality check was getting converted into a greater-than one . Here is the repro code : and here is the code that gets generated by the decompiler : Here 's the link to the repro . Why does Roslyn... | Why is Roslyn generating a > comparison instead of a ! = one here ? |
C_sharp : I just wrote an if statement in the lines ofand it annoys me that I always have to repeat the 'value == ' part . In my opinion this is serving no purpose other than making it difficult to read.I wrote the following ExtensionMethod that should make above scenario more readable : Now I can simply writeIs this a... | Is this a good use of an ExtensionMethod ? |
C_sharp : Let 's assume that I have a controller 's action which does the following : checks if there is a calendar slot at a particular timechecks if there are no appointments already booked that overlap with that slotif both conditions are satisfied it creates a new appointment at the given timeThe trivial implementa... | Enforcing business rules in entity framework core |
C_sharp : I 've got some inheritance going , requiring a custom JsonConverter for deserialization . I 'm using a very straightforward approach for now where I determine the type based on the existence of certain properties.Important note : in my actual code I can not touch the DeserializeObject calls , i.e . I can not ... | How to deserialize a list of abstract items without passing converters to DeserializeObject ? |
C_sharp : I have a list of ranges . Each range has a from and to value , meaning the value can be between that range . For eample if range is ( 1,4 ) . , the values can be 1,2,3 and 4 . Now , I need to find the distinct values in a given list of range . Below is the sample code.I can loop through every range and find t... | Efficient Logic to get distinct values from a range of values in c # 2.0 |
C_sharp : I 'd like to reinterpret a string in a array of int where every int take charge of 4 or 8 chars based on processor architecture.Is there a way to achieve this in a relatively inexpensive way ? I tried out this but does n't seem to reinterpret 4 chars in one intSOLUTION : ( change Int64 or Int32 based on your ... | reinterpret cast an array from string to int |
C_sharp : I 'm trying to detect when mouse enters VS 2017 title bar , but I 've noticed that MouseEnter and MouseLeave events do n't work correctly . Event fires only when mouse enters child controls outlined by green rectangle on the screenshot below.The title bar is a DockPanel with some elements in it . I 've set it... | IsMouseOver returns false over some elements in a DockPanel |
C_sharp : I have read that a 'BackgroundWorker ' is designed to be replaced by Ansyc/Await . Because I like the condensed look of Async/Await , I am starting to convert some of my BackgroundWorkers into Async/Await calls.This is an example of the code I have ( called from the UI ) : When I call RunFromTheUI it will ret... | Does an await make the rest of the method asynchronous ? |
C_sharp : I am trying to define code contracts for an interface using ContractClass and ContractClassFor . It works fine when everything is in the same assembly , but if I put the interface definition and its respective contract class in a different assembly then the concrete class implementation , it does n't work any... | Code Contracts for C # does not work when ContractFor is on a different assembly |
C_sharp : IntroductionAs a developer , I 'm involved in writing a lot of mathematical code everyday and I 'd like to add very few syntactic sugar to the C # language to ease code writing and reviewing.I 've already read about this thread and this other one for possible solutions and would simply like to know which best... | Extending C # language , how much effort/gain ? |
C_sharp : As in : And how do I search for it in the documentation ? <code> public string [ , ] GetHelp ( ) { return new string [ , ] { ... things ... } } | What does [ , ] mean in c # ? |
C_sharp : I 'm working on my solution to the Cult of the Bound Variable problem.Part of the problem has you implement an interpreter for the `` ancient '' Universal Machine . I 've implemented an intepreter for the machine they describe and now I 'm running a benchmark program that the university provided to test it.My... | How can I speed up array cloning in C # ? |
C_sharp : I 'm using Visual Studio 2015 on Windows 10 , I 'm still a new coder , I 've just started to learn C # , and while I was in the process , I discovered the Math class and was just having fun with it , till the console outputted : `` ∞ `` It 's a Console ApplicationHere 's the code : Why is this happening ? usi... | C # : The console is outputting infinite ( ∞ ) |
C_sharp : I bet that 's an easy question for you , but searching SO or Google with { or } in the search string does n't work very well.So , let 's say i wan na output { Hello World } , how do i do this using string.format ( ... ) ? Edit : looks like this : would do the job , but that does n't look very elegant to me . ... | Output ' { ' or ' } ' with string.format ( ... ) |
C_sharp : I have an ID with me and I have name with me . So in essence , my method just has these parameters : and I have this piece of logic inside method : That 's it . Nothing fancy . I get this error : `` An object with the same key already exists in the ObjectStateManager . The ObjectStateManager can not track mul... | Why I do I fall into all of the hurdles for a simple update in EF ? |
C_sharp : When we have two structs , and one is implicitly convertible to the other , then it seems like the System.Nullable < > versions of the two are also implicitly convertible . Like , if struct A has an implicit conversion to struct B , then A ? converts to B ? as well.Here is an example : Inside some method : In... | `` Covariance '' of the System.Nullable < > struct |
C_sharp : I 'm trying to match strings that look like this : But not if it occurs in larger context like this : The regex I 've got that does the job in a couple different RegEx engines I 've tested ( PHP , ActionScript ) looks like this : You can see it working here : http : //regexr.com ? 36g0eThe problem is that tha... | RegEx does n't work with .NET , but does with other RegEx implementations |
C_sharp : As you can see in the following image , I have a model with a base class `` Person '' and both entities `` Kunde '' and `` Techniker '' inherit the base class.Now I 've got following problem . When I try to use the method Find to get an object of the derived class Kunde with given ID , it tells me that OfType... | Finding inherited object by ID - Entity Framework |
C_sharp : I 'm trying to learn how to use WPF binding and the MVVM architecture . I 'm running into some trouble with Dependency Properties . I 've tried to control the visibility of an item on the view by binding it to a DependencyProperty in the DataContext , but it does n't work . No matter what I set the GridVisibl... | WPF Data Binding Architecture Question |
C_sharp : I 'm trying to create an instance of a generic class , without knowing what type to cast it to it until runtime . I 've written the following codeHopefully that gives you an idea what I 'm trying to do , however it wont compile it just says `` the type or namespace pType could not be found '' . Is there any e... | C # Generics |
C_sharp : I have a very basic video recording project that was working perfectly in Swift , but the same code ported into a blank project in Xamarin is producing a video that is constantly skipping frames every few seconds . The code starts in ViewDidLoad and is stopped via a UIButton Here is the recording code below :... | Video produced by ReplayKit is constantly skipping frames in Xamarin |
C_sharp : I 'm trying to use reflection to retrieve a list of all methods of an interface + its base interfaces.So far I have this : I 'd like to be able to filter out methods that shadow methods declared in base interfaces , i.e. , `` new '' methods : With my current code , the result includes both methods - I 'd like... | How to check whether an interface 's MethodInfo is a `` new '' method |
C_sharp : I have this BdlTabItem which receives a parameter of type DockableUserControl and would like to know if is it a bad practice to create a circular reference between the two by using uc.TabItem = this and new BdlDockableWindow ( this ) before the constructor finishes.I know this behavior can be considered reall... | Is it a bad practice to pass `` this '' as parameter inside its own constructor ? |
C_sharp : I have some objects that read a file , save the data in arrays and make some operations . The sequence is Create object A , operate with object A . Create object B , operate with object B ... The data read by each object may be around 10 MB . So the best option would be to delete each object after operate wit... | Need to delete objects : implement Dispose or create objects in a function ? |
C_sharp : I have the following block of linq queries to calculate some values for a report.I 've stepped through the code in a debugger and I 've noticed some oddities . After assigning into test its value is 0 . After assigning into test2 test2 == 0 and test == 11.31 after assigning into test3 test == 11.31 test2 == 1... | Why do n't the values from my linq queries appear immediately ? |
C_sharp : EDITIf I use Stopwatch correctly and up the number of iterations by two orders of magnitude I getTernary took 22404msNormal took 21403msThese results are closer to what I was expecting and make me feel all is right with the world ( if not with my code . ) The Ternary/Conditional operator is in fact marginally... | Why does the conditional ( ternary ) operator seem significantly faster ? |
C_sharp : I have ICollectionView looks like I want to use drag & drop to change the item Series Name , and location on the list view any idea how to do that for example if Idraged and droped book3 in ScienceFiction the output should be I use xaml code like this : <code> public ICollectionView UsersCollectionView { get ... | change the group of item in ICollectionView |
C_sharp : Is there a performance difference between the following two pieces of code ? andMy gut feeling is that the compiler should optimize for this and there should n't be a difference , but I frequently see it done both ways throughout our code . I 'd like to know if it comes down to a matter of preference and read... | Is there a performance difference by excluding an 'Else ' clause ? |
C_sharp : Situation : Assembly 1 is a application that other developers can use.We will give them only the .dll so we can publish updates from the application if we do n't change the api . The developers ca n't change the framework in assembly 1Methods are virtual so developers can override methods to implement there o... | C # OO design problem with override from methods |
C_sharp : I 'm trying to write a complement function , such that when provided with a function f , it returns a function which , when provided with the same input as f , returns it 's logical opposite.Having put similar code into VS2017 , I get no errors , however I 'm not yet able to run the code to see if it 'll work... | Complement higher order function |
C_sharp : I would like to write a method that gives me the 3 letters - representing the day , month , year - from a datetimeformat.So in en-US culture my desired return values would be ( plus the separator ) dMy/in de-DE the same method should returnT ( Tag = day ) M ( Monat = month ) J ( Jahr = year ) . ( Separator ) ... | DateTime get the letters representing day , month , year from the currentculture |
C_sharp : I found interesting behavior of LinkedList < T > . I ca n't call Add method for an instance of LinkedList < > . However LinkedList < T > implements ICollection < T > ( link ) which actually has the Add method . Here are examples . When I do like this , it works perfect : But this code even will not compile : ... | LinkedList does not contain explicit Add method |
C_sharp : I know I can create expression trees using : Factory methods.Compiler conversion of a lambda expression to an Expression.For complicated expression trees I would prefer 2 because it is more concise.Is it possible to refer to already constructed Expressions using this way ? <code> using System ; using System.L... | Using an Expression in a compiler-generated expression tree |
C_sharp : In one class , ClassA , I have a timer object . In this class I register the event handlers for the timer elapsed event . In another class , ClassB , I have a public event-handler for the timer elapsed event . So I register the event-handler from ClassB in ClassA as follows : What happens if I were to create ... | What happens when an event fires and tries to execute an event-handler in an object that no longer exists ? |
C_sharp : Sorry about the vocabulary question but I ca n't find this anywhere : how do you call this below ? Is it a statement , a directive , ... ? I want to indicate that you have to insert that line in order to give MyAssembly access to your assembly 's internal members , but I 'd like to use a more specific term th... | What is [ assembly : InternalsVisibleTo ( `` MyAssembly '' ) ] ? A statement , directive , ... ? |
C_sharp : I wonder what the difference is between the following methods with regards to how the object parameter is referenced : andShould I use ref object parameter in cases where I want to change the reference to the object not override the object in the same reference ? <code> public void DoSomething ( object parame... | What is the difference between 2 methods with ref object par and without ? |
C_sharp : While analyzing the .NET memory allocation of my code with the Visual Studio 2013 performance wizard I noticed a certain function allocating a lot of bytes ( since it is called in a large loop ) . But looking at the function highlighted in the profiling report I did n't understand why it was allocating any me... | non executing linq causing memory allocation C # |
C_sharp : I 'm trying to refactor some code to use .NET Core dependency injection via mapping services in startup.cs . I would like to inject an IRequestDatabaseLogger here instead of newing it up . However it requires the context in the constructor . How can I achieve this ? Is it even possible without an DI framework... | Injecting a logger with constructor dependencies |
C_sharp : I 'm trying to create a generic method that will return a predicate to find elements in an XML document . Basically something like this : Only thing is that this does n't compile . The problem is on the ( T ) x.Attribute ( criterion.PropertyName ) part where the compiler indicates : Can not cast expression of... | Is there a way to do this kind of casting in a c # predicate |
C_sharp : I 've been working , giving up and then reworking on this problem for a couple days . I 've looked at a lot of different ways to go about however I either ca n't implement it correctly or it does n't suit what I need it to do.Basically : I have two arrays , prefix and suffix I need to : Have a minimum of 3 us... | C # OR Javascript Permutations of two arrays multiple times |
C_sharp : I have been struggling with these elements for about 2 months . The first problem arise when my MVC4 application was recycled . The current logged-in user suddenly can not access any controller actions which are marked [ Authorize ] . Also , any successful access to the controller action which requires databa... | ASP.NET MVC : How do SimpleMembership , SQLSession store , Authentication , and Authorization work ? |
C_sharp : I 'd like to arrange some TextBlocks horizontally without any margins . I can see that my TextBlock is as small as it should be , but for some reason a lot of space is added around it . I think it has something to do with the ListView or its styling , but I do n't know what.I have a following layout : <code> ... | Too much spacing between StackPanel items in Windows Store app |
C_sharp : it 's possible write something like : C # there a equivalent to .apply of javascript ? <code> function foo ( a , b , c ) { return a + b + c ; } var args = [ 2,4,6 ] ; var output = foo.apply ( this , args ) ; // 12 | dynamic arguments definition in C # |
C_sharp : I 've been reading Jon Skeet 's C # In Depth : Second Edition and I noticed something slightly different in one of his examples from something I do myself.He has something similar to the following : Whereas I 've been doing the following : Is there any real difference between the two ? I know Jon Skeet is pre... | Linq with dot notation - which is better form or what 's the difference between these two ? |
C_sharp : I need a data structure with both named column and row . For example : I need to be able to access elements like magic_data_table [ `` row_foo '' , `` col_bar '' ] ( which will give me 3 ) I also need to be able to add new columns like : AFAIK , DataTable only has named column ... EDIT : I do n't need to chan... | Is there a `` DataTable '' with `` named row '' in C # ? |
C_sharp : Robert C. Martin in one of his talks about clean architecture openly criticizes fairly standard way of doing things nowadays.Robert C. Martin - Clean Architecture and DesignWhat I understand as standard way is something like this : Martin here says , that the application should reveal its purpose immediately ... | How can a top level directory structure reveal the purpose of the application ? |
C_sharp : I 'm trying to replace CompilationUnitSyntax of a class using Roslyn.However , ReplaceNode that I 'm using has a different signature than ReplaceNode in Roslyn FAQ and any StackOverflow question that I 've looked at . Can anyone point out why is that , and how can I use ReplaceNode that takes old ClassDeclara... | Ambiguity in Roslyn 's CompilationUnitSyntax.ReplaceNode |
C_sharp : I have a list like so : and each element of the string array is another array with 3 elements.So countryList [ 0 ] might contain the array : How can I search countryList for a specific array e.g . how to search countryList for <code> List < string [ ] > countryList new string [ 3 ] { `` GB '' , `` United King... | How to search a list in C # |
C_sharp : I would like to implement my generic IQueue < T > interface in an efficient way by doing one implementation if T is struct and another if T is a class.The , I 'd like to have a factory method which based on T 's kind returns an instance of one or the other : Of course , the compiler indicates that T should be... | Chose generic implementation if the type parameter is struct or class |
C_sharp : I have a form that i dynamicly compiled and i have a style class . When i copy this style class to my form source and compile it all works fine . But how can i use this style class without copy it to my form source . My main program that compile this form has this class , how can i use it ? Maybe i can pass s... | How to use custom class with dynamic compilation |
C_sharp : I have a function which among other things does a conversion from Utc to Local and vice-versa.The problem is that when I run it on a PC with Win 7 it works OK , but when I run it on a PC with Vista the conversion goes wrong.ex : My current time zone is +2 UTCMyCurrentTime is set to 27.09.2012 , 19:00 and the ... | DateTime conversion from Utc to Local in .NET 4.0 |
C_sharp : I have a vector class with two deconstruction methods as follows : Somewhere else I have : This gives me : How is this ambiguous ? Edit : Calling Deconstruct manually works fine : <code> public readonly struct Vector2 { public readonly double X , Y ; ... public void Deconstruct ( out double x , out double y )... | Deconstruction is ambiguous |
C_sharp : I have some user admin functionality in a WPF app that I 'm currently writing and would like to make it a bit more intuitive for the end userI 'd like to be able to provide some kind of means of easily editing the list of roles a given user belongs to . At the moment the grid is filled as a result of binding ... | Enhancing the display of a particular column in a WPF grid view |
C_sharp : I have two arrays , one with values an one with indicesnow I want a result array from the items selected by the indices of indices arrayQuestion : Is there a more generic approach for this ? <code> int [ ] items = { 1 , 2 , 3 , 7 , 8 , 9 , 13 , 16 , 19 , 23 , 25 , 26 , 29 , 31 , 35 , 36 , 39 , 45 } ; int [ ] ... | Get array items by index |
C_sharp : Let 's say I have a service interface that looks like this : I would like to fulfill some cross-cutting concerns when calling methods on services like these ; for example , I want unified request logging , performance logging , and error handling . My approach is to have a common base `` Repository ' class wi... | Why is n't type inference working in this code ? |
C_sharp : How can we access the complete visual studio solution from code analyzer in Roslyn ? I have been trying semantic analysis without much help.This is what I came up with using intellisense but this always gives a null value . <code> var sol = ( ( Microsoft.CodeAnalysis.Diagnostics.WorkspaceAnalyzerOptions ) con... | Accessing VS complete solution in roslyn |
C_sharp : I 'm generating a file on the fly on the event of a button . I have to following code : I would like the Save As Dialog to appear after the first flush , because the operation can take a while . How would I go about ? After some playing around I discovered that it will buffer 256 characters ( reproducible by ... | How to make a save as dialog appear `` early '' ? Or : How to make Flush ( ) behave correctly ? |
C_sharp : I have a checkbox substituting a switch-like control.It works great . The only problem is that this checkbox initial mode can be either true or false . For false - no problem , but if it 's true , then when the view is loaded , you immediately see the animation of the switch moving . I want to prevent that . ... | Pause/prevent animation for a checkbox control |
C_sharp : Consider the following code that I 'm using when displaying a Customer 's mailing address inside a table in a view : I find myself using a fair amount of these ternary conditional statements and I am wondering if there is a way to refer back to the object being evaluated in the condition so that I can use it ... | ASP.NET MVC/C # : Can I avoid repeating myself in a one-line C # conditional statement ? |
C_sharp : If I compile the following code snippet with Visual C # 2010 I ALWAYS get false : Does anybody know why ? ? ? <code> object o = null ; Console.WriteLine ( `` Is null : `` + o == null ) ; // returns false | Testing for null reference always returns false ... even when null |
C_sharp : In ASP.NET Core you can validate all non-GET requests by including this line in Startup.cs ( docs ) : However , if you add the filter by type ( using typeof or the generic Add < T > method ) , the validation does n't seem to work : See https : //github.com/davidgruar/GlobalFilterDemo for a minimal repro.What ... | Why does adding AutoValidateAntiForgeryTokenAttribute by type not work ? |
C_sharp : The following Rx.NET code will use up about 500 MB of memory after about 10 seconds on my machine.If I use the Observable.Generate overload without a Func < int , TimeSpan > parameter my memory usage plateaus at 35 MB.It seems to only be a problem when using SelectMany ( ) or Merge ( ) extension methods . <co... | Why does this Observable.Generate overload cause a memory leak ? [ Using Timespan < 15ms ] |
C_sharp : I 'm trying to get the positions of controls ( buttons ) but it keeps returning { 0 ; 0 } . I 'm sure there 's an explanation for this , but I ca n't figure out why this happens.I want the position of the control , relative to the window or a certain container . My buttons are arranged in another grid . Takin... | WPF - Getting position of a control keeps returning { 0 ; 0 } |
C_sharp : ReSharper has features that look for inconsistencies in the use of keywords aliasing a type name . For example , it would see these two declarations and urge you to change one to be like the other ( depending on which is set as your preference ) : This is handy , because I always prefer using the keyword alia... | Can ReSharper use keyword for declarations but type name for member access ? |
C_sharp : I know and I think I understand about the ( co/conta ) variance issue with IEnumerables . However I thought the following code would not be affected by it.This class is to mimic BackgroundWorker 's RunWorkerCompletedEventArgs so I can return errors from my WCF service without faulting the connection.Most of m... | Implicit cast fails for myClass < T > when T is IEnumerable < U > |
C_sharp : Is there a way of calling a method/lines of code multiple times not using a for/foreach/while loop ? For example , if I were to use to for loop : The lines of code I 'm calling do n't use ' i ' and in my opinion the whole loop declaration hides what I 'm trying to do . This is the same for a foreach.I was won... | Looping through a method without for/foreach/while |
C_sharp : We have a lot of code that passes about “ Ids ” of data rows ; these are mostly ints or guids . I could make this code safer by creating a different struct for the id of each database table . Then the type checker will help to find cases when the wrong ID is passed.E.g the Person table has a column calls Pers... | Is it a good idea to create a custom type for the primary key of each data table ? |
C_sharp : I have a float4x4 struct which simply containts 16 floats : I want to copy an array of these structs into a big array of floats . This is as far as I know a 1:1 copy of a chunk of memoryWhat I do know is rather ugly , and not that fast : If I was using a lower level language , I would simply use memcpy , what... | Is there a faster/cleaner way to copy structs to an array in C # ? |
C_sharp : Im trying to make a universal parser using generic type parameters , but i ca n't grasp the concept 100 % As you might guess , the code does n't compile , since i ca n't convert int|bool|string to T ( eg . value = valueInt ) . Thankful for feedback , it might not even be possible to way i 'm doing it . Using ... | Generic type parameters using out |
C_sharp : I have a ( C # ) function that checks four sets of conditions and returns a bool . If any of them are true , it returns true . I 'm sure I could simplify the logic but I want it to be fairly readable.The CodeMaid extension in Visual Studios and tells me the cylomatic complexity of the function is 12 . I looke... | Why is the cylcomatic complexity of this function 12 ? |
C_sharp : Why does the following compile ? It sure seems like the compiler has enough info to know that the attempted assignment is invalid , since the return type of the Func < > is not dynamic . <code> Func < dynamic , int > parseLength = whatever = > whatever.Length ; dynamic dynamicString = `` String with a length ... | Why does the compiler treat the return type of Func < dynamic , int > as strongly typed ? |
C_sharp : I 'm trying to make a dynamic array in C # but I get an annoying error message . Here 's my code : And the error : This is just baffling my mind . I came from VB , so please me gentle , lol.Cheers . <code> private void Form1_Load ( object sender , EventArgs e ) { int [ ] dataArray ; Random random = new Random... | Ca n't make an array in C # |
C_sharp : want to know why String behaves like value type while using ==.StringBuilder and String behaves differently with == operator . Thanks . <code> String s1 = `` Hello '' ; String s2 = `` Hello '' ; Console.WriteLine ( s1 == s2 ) ; // True ( why ? s1 and s2 are different ) Console.WriteLine ( s1.Equals ( s2 ) ) ;... | Why String behaves like value type while using == |
C_sharp : Currently working on a 2-way lookup association generic , sorted by TKey . At some point I hope to have access like the following : But obviously when TKey == TValue this will fail . Out of curiosity , is there a conditional compile syntax to do this : <code> public class Assoc < TKey , TValue > { public TKey... | Conditional Compile of Generic Methods |
C_sharp : Programmers on my team sometimes open a transaction and forget to include the scope.Complete ( ) statement ( see code block below ) . Any ideas on ways to either ( 1 ) search our solution for missing scope.Complete ( ) statements , or ( 2 ) have Visual Studio automatically highlight or raise a warning for mis... | C # - How do I check for missing scope.Complete ( ) statements ? |
C_sharp : How would I know what `` it '' means here ? Whole example from MSDN docs <code> productQuery1.SelectValue < Int32 > ( `` it.ProductID '' ) ; using ( AdventureWorksEntities context = new AdventureWorksEntities ( ) ) { string queryString = @ '' SELECT VALUE product FROM AdventureWorksEntities.Products AS produc... | Where does `` it '' come from in this example of ObjectSet < T > .SelectValue ? |
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