FIX: "The type or namespace name 'ClassName' does not exist" error ...
Cause. This issue occurs because an incorrect minimally qualified name for the public control is generated in the source code. For example, the public control is represented as "X.Control1" instead of "C.X.Control1." The minimally qualified name generation process in Visual Studio ignores the inaccessible types in the child namespace.
Microsoft .NET Framework 4.6.1 RC Targeting Pack and Language Packs for ...
The .NET Framework 4.6.1 RC Targeting Pack is a package that enables developers to build applications targeting the .NET Framework 4.6.1 RC by using either Visual Studio 2015, Visual Studio 2013, Visual Studio 2012 or third-party IDEs.