Methods for referencing assemblies within the global assembly cache _ Practical Tips

This is the same as the VS self-contained assembly, which uses the GAC only at run time, and the Assembly used at development time is a copy of the GAC, which is usually "D:\WINDOWS\Microsoft.NET\Framework\ version number \" Under the. NET directory.

There are three ways to solve the problem for you:
1. Copy the assembly to be placed in the GAC and place it under "D:\WINDOWS\Microsoft.NET\Framework\ version number \". VS will automatically load the assembly of this directory, so it can be referenced in the project.
2. Copy the assembly that you want to put into the GAC, put it under the project folder, and add a file reference.
3. If you have the project source code for this GAC assembly, you can add the project directly to the solution and then add the project reference to the other project.