Find Dot Net Framework Versions and Bit Size?

Two ways for finding this:
First Way::
Goto this address C:\Windows\Microsoft.NET\
Then you get two folders Framework and Framework64

• Framework folder having all version of Dot Net framework for 32-bit machine: version of dot net framework.

1. V1.0*
2. V1.1*
3. V2.0*
4. V3.0*
5. V3.5*
6. V4.0*

• Framework64 folder having all version of Dot Net framework for 64-bit machine: version of dot net framework

1. V2.0*
2. V3.0*
3. V3.5*
4. V4.0*

Second Way::
Press window + r , then type regedit.exe
Goto this address HKEY_LOCAL_MACHINE/Software/Microsoft/Net Framework Setup/
Now check all version and their installation Path.