To delete all the list items in a SharePoint list

1. private void DeleteAllItemsUsingBatch()  
2.     {  
3.         using (SPSite site = new SPSite("http://mySharePointServer"))  
4.         {  
5.             SPWeb web = site.OpenWeb("/");  
6.             SPList list = web.Lists["Links"];  
7.             StringBuilder sb = new StringBuilder();  
8.             sb.Append("<batch>");  
9.             string batchCommand = "<method><setlist scope=\"Request\">" + list.ID + "</setlist><setvar name=\"ID\">{0}</setvar><setvar name=\"Cmd\">DELETE</setvar></method>";  
10.             foreach (SPListItem item in list.Items)  
11.             {  
12.                 sb.Append(string.Format(batchCommand, item.ID.ToString()));  
13.             }  
14.             sb.Append("</batch>");  
15.             web.AllowUnsafeUpdates = true;  
16.             site.RootWeb.ProcessBatchData(sb.ToString());  
17.             web.AllowUnsafeUpdates = false;  
18.             web.Close();  
19.         }  
20.     }