The type or namespace does not exist

Question

Ok, I have had this one a million times before and it\'s been answered 1 million +1 times before.

And yet, once again. I have 3 projects, A, B, and C, each a DLL. Each

Answer 1

After many hours of frustration, I discovered the following process to resolve this issue with a VS2017 solution:

Insure that all reference assemblies have been recognized and have current properties.

If assemblies do not show proper reference, right click the entry
and view properties.  This action often resets the reference. This
action must be completed for each project in the solution.

After resolving all references, if the error continues, delete the
following:

        -The Obj folder

        -The Bin folder

        -Reference to the offending assembly

        -Clean and Rebuild the solution.  Errors should occur.

        -Re-reference the needed assembly.

The editor should no longer show the namespace error and build should succeed.