gistfile1.cs

			// xxx =>
			try {
				var x = Expression.Parameter( source.ElementType, "x" );
				// => xxx
				var selector = Expression.Lambda( Expression.PropertyOrField( x, co.GetOrderColumn() ), x );
				return source.Provider.CreateQuery(
						Expression.Call( typeof( Queryable ), co.IsDescending() ? "OrderByDescending" : "OrderBy", new Type[] { source.ElementType, selector.Body.Type },
										 source.Expression, selector
							) ) as IQueryable<T>;
			} catch {
				return source;
			}