How to specify a type of COM-object activation

How to specify a type of COM-object activation: in-proc, local server etc - in C# client? I want to use a .NET analog of CLSCTX_INPROC_SERVER constant. Documentation for used COM component insist that all types of activation are possible.

When you create an instance of a COM object using COM Interop, it is the equivalent of calling CoCreateInstance with CLSCTX_ALL.
(See COM Interop Part 1: C# Client Tutorial.)
If you don't like the automatic behavior, then Create the object manually (PInvoke CoCreateInstance) and just marshal the interface pointer to get a runtime callable wrapper by specifying
MarshalAs(UnmanagedType.Interface) on the result.  (The DllImport signature provided at the pinvoke.net link above marshals it this way.)

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