Запустите файл DLL
// open cmd in project location then type as follow
// dotnet intalled location run loaction of dll file
"C:\Program Files\dotnet\dotnet.exe" run \bin\Debug\net6.0\NotePad++.dll
// if You haven't builde the program then first build it
"C:\Program Files\dotnet\dotnet.exe" build ProjectName.csproj
PrashantUnity