How do I know which version of the .NET Framework my program is running on?

Question

I have a program which I believe to be running in .NET 4.0, but I am unable to mixed-mode debug it (something new .net 4.0 for 64-bit application)

I wanted to confirm if I'm truly running in .NET 4.0 or is it running .NET 3.5

Is there a way to look in the memory space or something?

Answer 1

Different options are:

• Check the value of Environment.Version
• typeof (int).Assembly.GetName ().Version: this will give you the running mscorlib.dll assembly version.
• Use Process Explorer if you can't change the code. Then check which version of mscorlib is loaded and from where.