Execute C# code directly on Windows by double-clicking the source file

temp.cs.bat

@echo off
SET OutputCs="TempCs.cs"
SET OutputExe="TempCs.exe"
if exist %OutputCs% goto ExecuteCs
del %OutputCs%
for /f "usebackq skip=20 delims=|" %%i in (%0) do (echo %%i>>%OutputCs%)
:ExecuteCs
pushd %~dp0
FOR /F "TOKENS=1,2,*" %%I IN ('REG QUERY "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework" /v "InstallRoot"') DO IF "%%I"=="InstallRoot" SET FrameworkPath=%%K
SET PATH="%PATH%;%FrameworkPath%v4.0.30319\;%FrameworkPath%v3.5;%FrameworkPath%v3.0;"
csc /nologo /out:%OutputExe% %OutputCs% 
if %ERRORLEVEL% NEQ 0 goto ExecuteFAILURE
echo __________ Execute Compiled Cs File Inside Bat File _________________
%OutputExe%
del %OutputExe% %OutputCs%
exit
:ExecuteFAILURE
%0
exit
REM  ========== Write your C# code below this line ==============

using System;
namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello, World!!");
            Console.Read();
        }
    }
}