.NET Fiddle Ideas

I suggest you ...

You've used all your votes and won't be able to post a new idea, but you can still search and comment on existing ideas.

There are two ways to get more votes:

  • When an admin closes an idea you've voted on, you'll get your votes back from that idea.
  • You can remove your votes from an open idea you support.
  • To see ideas you have already voted on, select the "My feedback" filter and select "My open ideas".
(thinking…)

Enter your idea and we'll search to see if someone has already suggested it.

If a similar idea already exists, you can support and comment on it.

If it doesn't exist, you can post your idea so others can support it.

Enter your idea and we'll search to see if someone has already suggested it.

  1. Allow breakpoints

    Allow setting breakpoints for debugging.

    204 votes
    Vote
    Sign in
    Check!
    (thinking…)
    Reset
    or sign in with
    • facebook
    • google
      Password icon
      Signed in as (Sign out)
      You have left! (?) (thinking…)
    • 142 votes
      Vote
      Sign in
      Check!
      (thinking…)
      Reset
      or sign in with
      • facebook
      • google
        Password icon
        Signed in as (Sign out)
        You have left! (?) (thinking…)
        1 comment  ·  Admin →
      • Support unit testing frameworks

        It'd be great to be able to use this for unit tests. Specifically, I think support for NUnit and XUnit would be very useful.

        139 votes
        Vote
        Sign in
        Check!
        (thinking…)
        Reset
        or sign in with
        • facebook
        • google
          Password icon
          Signed in as (Sign out)
          You have left! (?) (thinking…)

          We could create another Project type (NUnit for ex). If it is selected, Code would be divided into 2 sections: Code and Tests. Code would have the classes you need to test and Tests would have NUnit TestFixture class. Then when u run it – Output would show lists of tests and red/green next to them. Would that work? Please comment.

        • C# 6.0 Support

          Full roslyn release support

          101 votes
          Vote
          Sign in
          Check!
          (thinking…)
          Reset
          or sign in with
          • facebook
          • google
            Password icon
            Signed in as (Sign out)
            You have left! (?) (thinking…)
          • Share the code of dotnetfiddle open source on GitHub

            Share the code of dotnetfiddle open source on GitHub

            93 votes
            Vote
            Sign in
            Check!
            (thinking…)
            Reset
            or sign in with
            • facebook
            • google
              Password icon
              Signed in as (Sign out)
              You have left! (?) (thinking…)
            • Add commonly used "using" clauses by default

              I almost always want System, Linq, Collections, Generics and a few others in "using" clauses. I think they should be added to the blank default program, or maybe add a button to add them so I don't have to enter them manually.

              74 votes
              Vote
              Sign in
              Check!
              (thinking…)
              Reset
              or sign in with
              • facebook
              • google
                Password icon
                Signed in as (Sign out)
                You have left! (?) (thinking…)
              • Allow downloading source code

                Sometimes it'd be helpful to easily download the source code of a dotnetfiddle paste, either a single file or the whole paste (e.g. all files from a MVC "project")

                73 votes
                Vote
                Sign in
                Check!
                (thinking…)
                Reset
                or sign in with
                • facebook
                • google
                  Password icon
                  Signed in as (Sign out)
                  You have left! (?) (thinking…)
                  1 comment  ·  Admin →
                • Add "ASP.NET Web Form" to list of project types

                  Divide code section into ASPX and Code Behind.

                  Create Web App project on the fly and build it. With Default.aspx page having the code.

                  Display Default.aspx page in Output section or Popup

                  55 votes
                  Vote
                  Sign in
                  Check!
                  (thinking…)
                  Reset
                  or sign in with
                  • facebook
                  • google
                    Password icon
                    Signed in as (Sign out)
                    You have left! (?) (thinking…)
                  • Allow multiple files for Console projects

                    In many cases I'd love to be able to have multiple files in a single fiddle so I don't have to throw all my classes in a single file and thus making it harder to read/understand.

                    Being able to have many files would greatly benefit explaining complex problems/scenarios.

                    52 votes
                    Vote
                    Sign in
                    Check!
                    (thinking…)
                    Reset
                    or sign in with
                    • facebook
                    • google
                      Password icon
                      Signed in as (Sign out)
                      You have left! (?) (thinking…)
                      1 comment  ·  Admin →
                    • Allow uploading DLLs

                      Simply add an option to upload .NET libraries, like for testing them.

                      44 votes
                      Vote
                      Sign in
                      Check!
                      (thinking…)
                      Reset
                      or sign in with
                      • facebook
                      • google
                        Password icon
                        Signed in as (Sign out)
                        You have left! (?) (thinking…)
                        1 comment  ·  Admin →
                      • Add command line args

                        Please add the ability so we can pass custom args to the Program's Main method just like you can on http://www.ideone.com

                        43 votes
                        Vote
                        Sign in
                        Check!
                        (thinking…)
                        Reset
                        or sign in with
                        • facebook
                        • google
                          Password icon
                          Signed in as (Sign out)
                          You have left! (?) (thinking…)
                        • Support System.Web.Script.Serialization

                          So that we can use JavaScriptSerializer and others

                          36 votes
                          Vote
                          Sign in
                          Check!
                          (thinking…)
                          Reset
                          or sign in with
                          • facebook
                          • google
                            Password icon
                            Signed in as (Sign out)
                            You have left! (?) (thinking…)
                          • Add support for WebAPI using System.Web.Http

                            Add support for WebAPI using System.Web.Http

                            25 votes
                            Vote
                            Sign in
                            Check!
                            (thinking…)
                            Reset
                            or sign in with
                            • facebook
                            • google
                              Password icon
                              Signed in as (Sign out)
                              You have left! (?) (thinking…)
                            • Load the specified version of Json.NET rather than always loading 6.0.0.0

                              Whenever I add Json.NET as a nuget project, version 6.0.0.0 is attached rather than the selected version. For instance, in this fiddle: https://dotnetfiddle.net/6LyfRc the latest release version is selected, version 7.0.1, but "Console.WriteLine("Json.NET version: " + typeof(JToken).Assembly.FullName);" actually shows 6.0.0.0 was loaded.

                              24 votes
                              Vote
                              Sign in
                              Check!
                              (thinking…)
                              Reset
                              or sign in with
                              • facebook
                              • google
                                Password icon
                                Signed in as (Sign out)
                                You have left! (?) (thinking…)
                              • Font settings

                                I want to change font size for code editor, it is cosmetic, but very nice feature =)

                                21 votes
                                Vote
                                Sign in
                                Check!
                                (thinking…)
                                Reset
                                or sign in with
                                • facebook
                                • google
                                  Password icon
                                  Signed in as (Sign out)
                                  You have left! (?) (thinking…)
                                • Please allow to change platform target to either x86 or x64

                                  Any CPU won't allow you to load native dependencies e.g. SQLite. If this doesn't open security holes, please give users the option to specify platform target to be x86, x64 or Any CPU.

                                  20 votes
                                  Vote
                                  Sign in
                                  Check!
                                  (thinking…)
                                  Reset
                                  or sign in with
                                  • facebook
                                  • google
                                    Password icon
                                    Signed in as (Sign out)
                                    You have left! (?) (thinking…)
                                  • Use monaco-editor as default editor

                                    Monaco-editor is MIT licensed and made by Microsft.
                                    It's the same text editor used in VSCode, and it is open source!
                                    It also has many interesting features like code diff and editor customization.

                                    See more here:
                                    https://github.com/Microsoft/monaco-editor
                                    https://microsoft.github.io/monaco-editor/playground.html

                                    18 votes
                                    Vote
                                    Sign in
                                    Check!
                                    (thinking…)
                                    Reset
                                    or sign in with
                                    • facebook
                                    • google
                                      Password icon
                                      Signed in as (Sign out)
                                      You have left! (?) (thinking…)
                                    • dark theme

                                      Please give us inverted color theme, most developers are working with "white on black"

                                      17 votes
                                      Vote
                                      Sign in
                                      Check!
                                      (thinking…)
                                      Reset
                                      or sign in with
                                      • facebook
                                      • google
                                        Password icon
                                        Signed in as (Sign out)
                                        You have left! (?) (thinking…)
                                      • Nemerle

                                        Add Nemerle language: http://nemerle.org

                                        17 votes
                                        Vote
                                        Sign in
                                        Check!
                                        (thinking…)
                                        Reset
                                        or sign in with
                                        • facebook
                                        • google
                                          Password icon
                                          Signed in as (Sign out)
                                          You have left! (?) (thinking…)
                                        • hotkeys

                                          Add Support shortcuts for build and e.g. like in Visual Studio

                                          16 votes
                                          Vote
                                          Sign in
                                          Check!
                                          (thinking…)
                                          Reset
                                          or sign in with
                                          • facebook
                                          • google
                                            Password icon
                                            Signed in as (Sign out)
                                            You have left! (?) (thinking…)
                                            1 comment  ·  Admin →
                                          ← Previous 1 3 4 5
                                          • Don't see your idea?

                                          .NET Fiddle Ideas

                                          Feedback and Knowledge Base