问题内容: I had to find a value with the quickwatch and this is what I got out of it: ((System.Web.UI.WebControls.TextBox)(new System.Linq.SystemCore_EnumerableDebugView(GvAllCustomers.SelectedRow.Cells[1].Controls).Items[0])).Text GvAllCustomers is my gridview The problem is, when I add this to my code it shows errors. string sC_Name = ((System.Web.UI.WebControls.TextBox)(new System.Linq.SystemCore_EnumerableDebugView(GvAllCustomers.SelectedRow.Cells[1].Controls).Items[0])).Text; Error CS0234: The type or namespace name ‘SystemCore_EnumerableDebugView’ does not exist in