This exception is thrown when you specify a DataColumn.Expression property that can't be evaluated. A related exception is SyntaxErrorException . public class EvaluateException : InvalidExpressionException { // Public Constructors public EvaluateException ( ); public EvaluateException ( string s ); // Protected Constructors protected EvaluateException (System.Runtime.Serialization.SerializationInfo info , System.Runtime.Serialization.StreamingContext context ); } HierarchySystem.Object System.Exception(System.Runtime.Serialization.ISerializable) System.SystemException DataException InvalidExpressionException EvaluateException |