Microsoft (R) .NET Global Assembly Cache Utility.  Version 2.0.50727.42
Copyright (c) Microsoft Corporation.  All rights reserved.

Usage: Gacutil <command> [ <options> ]
Commands:
  /i <assembly_path> [ /r <...> ] [ /f ]
    Installs an assembly to the global assembly cache.

  /il <assembly_path_list_file> [ /r <...> ] [ /f ]
    Installs one or more assemblies to the global assembly cache.

  /u <assembly_display_name> [ /r <...> ]
    Uninstalls an assembly from the global assembly cache.

  /ul <assembly_display_name_list_file> [ /r <...> ]
    Uninstalls one or more assemblies from the global assembly cache.

  /l [ <assembly_name> ]
    List the global assembly cache filtered by <assembly_name>

  /lr [ <assembly_name> ]
    List the global assembly cache with all traced references.

  /cdl
    Deletes the contents of the download cache

  /ldl
    Lists the contents of the download cache

  /? 
    Displays a detailed help screen

 Options:
  /r <reference_scheme> <reference_id> <description>
    Specifies a traced reference to install (/i, /il) or uninstall (/u, /ul).

  /f 
    Forces reinstall of an assembly.

  /nologo
    Suppresses display of the logo banner

  /silent
    Suppresses display of all output