Thank u verymuch for ur timely help

In most fundamental terms, a DLL does not have it's own execution context. You cannot "run" a DLL. In order to run code in a DLL it must be loaded by an exe. DLLs are often created to allow reuse of general code, although this is not a requirement. A developer may create DLLs that are only intended for use by a single application, because a DLL allows more modular organization of code, and a DLL may be upgraded without having to redistribute a new version of an application. DLLs are not typically form oriented. An occasional DLL may display a dialog, but most DLLs contain primarily classes with few or no forms. For example, the NET framework is primarily composed of DLLs. In general, a well designed application that is any larger than "small" in terms of size and complexity will consist of an EXE that provides the forms and user interface, but all business logic and real guts of the application will be organized into a logical class structure provided by DLLs.

The best place to look for solutions to this is Microsoft. A simple search for "The server does not support debugging of ASP.NET" reveals PRB: Cannot Debug ASP.NET Web Application[^]. And if that doesn't work, you can try the results[^] returned by the search. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

what you need to do is add rows dynamically to the table source of the datagrid for eg:- you have a material table as a datasource to your datagrid.Now you dynamically add rows to this table.The rows added are material detail selected by user. the user selects specific material from the drop down combobox here is a sample code snippet Private Sub btnadd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnadd.Click Dim drow As DataRow = material.NewRow Dim drv As DataRowView = CType(cmbmatnam.SelectedItem, DataRowView) Try drow("column1") = drv("mat_id") drow("Column2") = drv("mat_name") drow("Column3") = drv("Rate") drow("Column4") = drv("Quantity") drow("Column6") = "Enter Quantity" material.Rows.Add(drow) material.AcceptChanges() Catch ex1 As System.NullReferenceException MessageBox.Show("There are No Materials In this Category") Catch ex2 As System.Data.ConstraintException MessageBox.Show("Material Is already Selected") Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub I hope this helps Mandar Patankar Microsoft Certified professional

hi, i think u said for web application, may i get the solution for window application to add/update/delete at runtime