Cannot add a nested relation or an element column to a table containing a SimpleContent column

Question

Hi iam write this code

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        DataSet ds = new DataSet();
                


        

Answer 1

In my case this error appeared on WCF client's side. On WCF server's side it was caused by missing SQL SELECT permission on a function -- System.Data.SqlClient.SqlException.

WCF client trying to deserialize a dataset, which was obviously not there, kept displaying "Cannot add a SimpleContent..." error. I would not call it a misleading message, but rather one that must be interpreted properly.