BrandonKelly.com

I've been writing on a dynamic rules module for AlphaStaff and dug into my framework bag to use this gem.  The following function will crawl an object's dependency graph to find out if a class is ultimately a subtype of another class.  This code sample is in VB but could be ported to C# easily.
 
Public Function IsSubClass(ByVal type As Type, ByVal check As Type) As Boolean If type Is Nothing OrElse check Is Nothing Then Return False End If If type Is check Then Return True End If If check.IsInterface Then For Each t As Type In type.GetInterfaces() If IsSubClass(t, check) Then Return True End If Next End If If type.IsGenericType AndAlso Not type.IsGenericTypeDefinition Then If IsSubClass(type.GetGenericTypeDefinition(), check) Then Return True End If End If Return IsSubClass(type.BaseType, check) End Function

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