Problem in adding reference of assemblies of GAC?

You can find any dll in gac at local path as given below:

C:\WINDOWS\assembly\GAC_MSIL\<Name of dll>\1.0.0.0__0fcde578cc202cae\<Name of dll>.dll

Note: 1.0.0.0__0fcde578cc202cae is the version name and it differs assembly to assembly.