How to generate excel using data table in c#

Public void GenerateExcel(Datatable dt)

{

string attachment = "attachment; filename=city.xls";

 Response.ClearContent(); Response.AddHeader("content-disposition", attachment);

 Response.ContentType = "application/vnd.ms-excel"; string tab = "";

 foreach (DataColumn dc in dt.Columns) 

{ 

Response.Write(tab + dc.ColumnName); 

        tab = "\t"; 

} 

Response.Write("\n"); int i;

 foreach (DataRow dr in dt.Rows)

 {         tab = ""; 

for (i = 0; i < dt.Columns.Count; i++)

 { 

Response.Write(tab + dr[i].ToString());   

          tab = "\t"; 

}

 Response.Write("\n"); 

}

 Response.End();

}