Interop effects by resolving and instantiating types with ArcObjects
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by Marko Apfel
on Geeks with Blogs
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Published on Fri, 25 Nov 2011 13:10:00 GMT
Indexed on
2011/11/25
17:51 UTC
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Problem
this code does not work
Type t = typeof(ESRI.ArcGIS.Framework.AppRefClass); System.Object obj = Activator.CreateInstance(t);
but yet this code
Type t = Type.GetTypeFromCLSID(typeof(ESRI.ArcGIS.Framework.AppRefClass).GUID); System.Object obj = Activator.CreateInstance(t);
Reason
In the first variant the runtime tries to cast to AppRefClass . This is not possible.
And in the second one, the runtime does not knows anything about AppRefClass. So it leave it as IUnknown.
(originally communicated by my co-worker Ralf)
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