This exception is thrown if you try to insert a null value into a column that has DataColumn.AllowDBNull set to false .

public class NoNullAllowedException : DataException {
// Public Constructors
   public NoNullAllowedException(  );  
   public NoNullAllowedException( string s);  
// Protected Constructors
   protected NoNullAllowedException(System.Runtime.Serialization.SerializationInfo info,
        System.Runtime.Serialization.StreamingContext context);
}

Hierarchy

System.Object System.Exception(System.Runtime.Serialization.ISerializable) System.SystemException DataException NoNullAllowedException