'gacutil' is not recognized as an internal or external command, operable program or batch file.

I was trying to install a *.dll file into GAC (Global assembly Cache) and I got the below error message

Open command prompt and run the below command :

gacutil.exe /i MyLibrary.dll

'gacutil' is not recognized as an internal or external command, operable program or batch file.

Fix

Open Visual Studio Command Prompt (2010) and run the command

gacutil.exe /i MyLibrary.dll