Testing assert feature need to set AssertUiEnabled property with log file.
... this can be set in the HTML interface, then make changes into to test it and have a log file for testing:

<configuration>

<system.diagnostics>

<assert assertuienabled="true" logfilename="myFile.log" />

</system.diagnostics>

</configuration>

I want a way to export my fiddle work and my build to my disk.
A simple exporter to zip cannot be hard for the team I saw a similar idea on this website: https://codepen.io.

.NET Fiddle is broken on proxy, please fix it.
Without socks5 proxy, nuget does not work (nuget is not censored, but fiddle nuget does not work).
With sock5 proxy, complete fiddle break down.

https://dotnetfiddle.net/qTKXnp

The Finally block is not executed while it always should.

sources:
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/try-finally

https://docs.microsoft.com/en-us/dotnet/csharp/fundamentals/exceptions/how-to-execute-cleanup-code-using-finally

if (!strTemp.Contains(strOriginal[i]))

Contains Method given error while I run this in .Net Env using Visual Studio it will not giving any error.

Run code here https://dotnetfiddle.net/dJWiIB. IsPositive returns wrong result for double but in VS2019 works as expected

Source info in stack frames is currently inaccessible, and so stack traces do not contain line numbers.

I would like source file info (at least line number) to be made accessible, it would be a big help for debugging.

Is it possible to add a debug mode checkbox so that System.Diagnostics.Debug.Assert can be enabled?

Bonus: Also enable line numbers in stack frames (currently, source info is inaccessible). https://dotnetfiddle.uservoice.com/forums/228764--net-fiddle-ideas/suggestions/43595874-enable-line-numbers-in-stack-traces

.

https://dotnetfiddle.net/vgdWI3

Func<Task<int>> al = async () =>
{ await Task.Delay(100); Console.WriteLine("AL"); return 1;};

var r = await al();

In fiddle (.NET 4.7.2) , I can't see "AL" which would printed by using .EXE from VS2019 or fiddle(.NET5).

In landscape orientation for the mobile version put the advertisements on the left or right, not the bottom. For code it helps to use landscape orientation but when we do there is much less horizontal space.

I began programming half a century ago. It is awesome to think I can use my phone to develop and test programs using an IDE. For me there was a time when we had only about one chance a day to run (test) our programs.

When using my phone, the toolbar is in the way. That is, there are buttons for Share, Collaborate, Tidy Up, Getting Started and a search icon and I do not see a way to get them out of the way.

I tried creating an account on your site and kept getting System Error 500 after I entered my e-mail, password and display name. I tried turning off my AdBlock and it still happened. I never received any account confirmation e-mails.

1

I'm not unlearning the ctrl+s habbit just to use this site.

Not sure if this is the right place for bug report. The following line causes a fatal error:

// Console.Readkey();

--> Fatal Error: Console.ReadKey() is not supported in .NET Fiddle.

Even

// console.readkey

produces exactly the same error (Console.ReadKey() is not supported).

It is a strange error. I tried different gibberish after // which was rightly ignored, except the syntactically correct ReadKey line.

This creates confusing discrepancies, e.g. https://stackoverflow.com/questions/66063734/system-io-path-getfilenamewithoutextension-does-not-trim-a-file-path (caused by the fact that \ is not a file separator on Linux, but is on Windows).

With the growing online environment where people can piece things together via tools like zapier. It would be nice if we could
1. have a special end point url for a fiddle that would return only the values generated by the code.
2. (advanced request) allow these special endpoints to accept values via QueryString that could be used in the code.

Use case would be to run some function on some small piece of data and return it in the new format.This could vary based on each users business logic needs.

lts support disappeared with net 5

I have an existing fiddle (https://dotnetfiddle.net/aLU0Z8) and try to change compiler cause a feature is missing (proprerty initializers) and when I do it it just clears the script and goes to the root url as if I was making some new fiddle. I had to copy-paste content from the old fiddle to make this one that compiles ok - https://dotnetfiddle.net/W9zCSm