The two assembly members being compared have different category

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since:  2012

Syntax

C#
public class AssemblyMemberDifferentCategory : AssemblyMemberDifference
Visual Basic
Public Class AssemblyMemberDifferentCategory _
	Inherits AssemblyMemberDifference
Visual C++
public ref class AssemblyMemberDifferentCategory : public AssemblyMemberDifference

Inheritance Hierarchy

System..::..Object
  Autodesk.Revit.DB..::..AssemblyMemberDifference
    Autodesk.Revit.DB..::..AssemblyMemberDifferentCategory

See Also