Is there a way we can run individual .cs files in Visual Studio Code.
I have followed this link and runs fine but then I added Program2.cs and try to run using "dotnet run Program2.cs" but it failed for obvious reasons saying
Program2.cs(7,21): error CS0111: Type 'Program' already defines a member called 'Main' with the same parameter types [csharp.csproj]"
Is there a way to run individual .cs files. Or any way I can run individual .cs files that outputs to terminal/command prompt or console.
dotnet command is just for .NET Core and you must do dotnet new console command to generate a project to run it
if you are using .NET Framework and having the environment variables correctly set on your system, you can use csc Program.cs command to individually compile a class file to an executable. But this way is highly deprecated for any further learning or development
"csharp": "scriptcs""csharp": "cd $dir && csc $fileName; && $dir$fileNameWithoutExt.exe"
"csharp": "scriptcs""csharp": "cd $dir && dotnet run $fileName"For this i've always used this c# scripting engine : http://csscript.net,
very easy to implement and works very well and you can reference local dlls, Nuget packages or GAC assemblies.
It also has a Visual studio code plugin, so you can run with F5, debug ...
As @Alsein suggested, you should use dotnet new console. Few details to add here are... run dotnet new console in the folder where you have your .cs file. This will then create a .csproj (this is the project file) a bin folder and an obj folder AND a Program.cs with an empty main method.
If you do dotnet run at this point, it will scold you saying there are 2 entry points. Delete the Program.cs created by the first command. Assuming you have only one other .cs file (your original file) WITH a main method .. you should be able to do dotnet run and get the result from your .cs file.
Also checkout this cool project https://github.com/filipw/dotnet-script - this will allow you to run .csx (c# script file) as individual files. So instead of writing .cs files, you write .csx script and run them as dotnet script helloworld.csx
In VSCode you can simply do this:
.csproj file:<PropertyGroup><StartupObject>namespace.classname</StartupObject></PropertyGroup>
$ dotnet run
If you want use the DivyashC answer using the CodeRunner Extension under Linux,
I suggest use the next command for step (5):
"csharp": "csc $fileName && ./$fileNameWithoutExt.exe"
Or if you want use Mono compiler (mcs):
"csharp": "mcs $fileName && ./$fileNameWithoutExt.exe"
I also had issue with this and I was able to come up with a quicker way to do this in VSCode thanks to @DivyashC's answer of CodeRunner execution for single file for C# and answer from Specify startup object on fly with a few tweak to the final setting as given below :
{ ...
"code-runner.clearPreviousOutput": true,
"code-runner.ignoreSelection": true,
"code-runner.executorMap": {
....
"csharp": "cd $dir && dotnet clean --nologo -v=q && dotnet build -v=q /property:StartupObject=$fileNameWithoutExt && dotnet run"
... }
...
}
After which I can directly run the individual files.
In Visual Studio Code Open the folder containing your Program.cs file, as long as their is a project file in that folder you can open a new terminal window and type dotnet build then after it builds dotnet run.
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.csprojfile as well as the C# file. – MultifoldMainfunction). What you can do is: Have multiple projects in one solution (with individual entrypoints, each. That will be multiple Programs, though) or have one main and control via cmd-line params what code to execute. One .cs file is not one program, it isn't even necessarily one class. It can contain multiple classes / types or one class can span multiple .cs files ... – Sigman