.NET framework version used

Question

I have a third-party program installed, and I want to find out what version of the .NET framework it is using.

How do I figure that out?

Answer 1

Start up the Visual Studio 2008 Command Prompt, go to the folder your assembly is in, type corflags.exe assemblyName.dll, and you should get the following information back.

Version   : v4.0.30319
CLR Header: 2.5
PE        : PE32
CorFlags  : 1
ILONLY    : 1
32BIT     : 0
Signed    : 0

Answer 2

I believe you can do that using ILDasm or .NET Reflector.

Open Visual Studio command prompt... Run ILDasm

If you open the Manifest, you should be able to get the .ver, and mscorlib's version should be target version. For ex. the following DLL is using 4.0

// Metadata version: v4.0.30319 .assembly extern mscorlib { .publickeytoken = (B7 7A 5C 56 19 34 E0 89 ) // .z\V.4.. .ver 4:0:0:0 }