.NET Fiddle Ideas

  1. Support null check operators

    Allow the compilation of null check operators i.e. DataSet?.Tables.Count. Currently the "?" screws up everything and a compilation error is received:

    Code:
    System.Data.DataSet ds = null;

        if (ds?.Tables.Count == 0 || ds?.Tables[0]?.Rows.Count == 0)
    
    {
    Console.WriteLine("True");
    }
    else
    {
    Console.WriteLine("False");
    }

    Errors:
    Compilation error (line 8, col 10): Invalid expression term '.'
    Compilation error (line 8, col 11): Syntax error, ':' expected
    Compilation error (line 8, col 35): Invalid expression term '.'
    Compilation error (line 8, col 36): Syntax error, ':' expected
    Compilation error (line 8, col 46): Invalid expression term '.'
    Compilation error (line 8, col 47): Syntax error,…

    3 votes
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  2. mobile/desktop button

    Mobile/Desktop versions switch button is needed on main menu.

    1 vote
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  3. 1 vote
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  4. F# is broken

    F# is broken

    1 vote
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  5. Add System.Windows.Forms

    Some of my code uses System.Windows.Forms.BindingContext (i.e. non UI code) and I want to reference it dotnetfiddle.net

    Unfortunately I can't write using System.Windows.Forms; as I get the error Compilation error (line 2, col 22): The type or namespace name 'Forms' does not exist in the namespace 'System.Windows' (are you missing an assembly reference?)

    3 votes
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  6. Solution/Project Explorer

    I would like to be able to create projects that contain multiple files so that I can create tutorials to teach student.
    The MVC project type for example allows for multiple files. but they are all together on screen and I can't close one down to focus on say the controller.

    VS Code uses Theia https://www.theia-ide.org/index.html - Perhaps you could also use this in your UI?

    3 votes
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  7. Be able to include import a Github repository

    This would really help to make samples of bugs / issues in a repository. One could import all the files of a repository, then write a "Test" that fails and the owner of the repository could then check out why it fails easily.

    See for example me manually uploading the files in a competitors product:
    https://repl.it/@devedse/ErrorWhenLoadingJpgWithExif

    3 votes
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  8. Bug(?)

    I was coding something and had some code to tell the user to press enter to continue. I did not want to keep writing it, so I copy and pasted it. However, this made my code go wonky. I had a switch later in the program and I was testing it out making sure it worked. I had copied and pasted the code after the switch, and this is where it gets weird... every time I ran it, it would go back to where I copied the code from and rerun the switch. I don't know why it happened but…

    1 vote
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  9. 3 votes
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  10. 1 vote
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  11. Bring in proper C# 7 tuple deconstruction

    Simple test:

    static (int, int) Foo(int i)

    {
    
    return (i+2, 1*2);
    }

    Current "result" :
    Predefined type 'System.ValueTuple`2' is not defined or imported

    Expected:
    To compile (and work of course :-)

    This includes updating "4.7.2" "Compiler" to accept C# 7.x and at least linking the proper dll with ValueTuple-a for "Roslyn 2.0"

    1 vote
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  12. nuget header directive for vb.net

    Why would you make a Nuget Header Directive available for C# but not for VB.Net?

    1 vote
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  13. User main page

    It would be nice to have a user page that lists the Fiddles that we have created. A main page of sorts.

    1 vote
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  14. Specify timezone for snippet

    Sometimes I need to check a code that works with local timezone which should be different from UTC. It would be great to have an ability to specify timezone in that cases. Thank you!

    4 votes
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  15. 1 vote
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  16. Support adding new page

    Such as controller or class or new .cHTML ...

    1 vote
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  17. ForegroundColor

    Change the text color with Console.ForegroundColor

    That the code can be used:
    Console.ForegroundColor = ConsoleColor.DarkBlue;

    Console.Write ("Hello");

    Console.ForegroundColor = ConsoleColor.DarkRed;

    Console.WriteLine ("World");

    3 votes
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  18. 3 votes
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  19. Automatically save the fiddle

    Please add this, at least as an option. Otherwise we can lose work. Thank you!

    3 votes
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  20. Enable adding assemply attributes like assemplyinfo.cs

    some class libraries loaded from nuget need setting assembly attributes located in assemplyInfo.cs otherwise it fire an exception, like:

    [assembly: AssemblyCompany("Company xyz")]

    [assembly: AssemblyCopyright("Copyright © 2018 Company xyz")]

    Enable setting these attributes in assemplyInfo.cs

    1 vote
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