casting type for objectGuid

dl
Date: 05/27/05 

Date: Fri, 27 May 2005 15:45:47 +0800

Hi
I am trying to put a user's objectGuid as the primary key onto a datatable
and be used as the unique key on editing / updating. But I seem to get
casting error with the following statement
dt.Columns.Add(new DataColumn("object_Guid", typeof(string)));

Any idea?

TIA 

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