Getting an Assembly’s 4 part name

Problem

You need to locate the 4 part name for an assembly, presumably to register the assembly in a web.config file.

Solution

Step 1 - Locate Gacutil which can be in a variety of places including Windows SDK & Visual Studio.  The easiest way to run this command is to open a “Visual Studio Command Prompt” located in your visual studio installation.

Step 2 – Type the following command

Gacutil /l MyAssemblyName.dll

Step 3 – Use the file>copy command to copy content from the dos window.

To Install and Assembly into the GAC

To install an assembly into the GAC type the following command

Gacutil /i MyAssemblyName.dll

To Uninstall an assembly from the GAC

Gacutil /uf MyAssemblyName (without the .dll)