Deleting an item from sharepoint list

If you would like to delete an item from SPListItemCollection in share point,
Use the following code


SPSite site = null;
SPWeb web = null;

try
{
SPSecurity.RunWithElevatedPrivileges(delegate()
{
site = SPContext.Current.Site;
site.AllowUnsafeUpdates = true;
web = site.OpenWeb();
SPList list = web.Lists["Test"];
SPQuery oQuery = new SPQuery();
oQuery.Query = "" + txtGaugeID.Text + "";
SPListItemCollection oDeleteCollection = list.GetItems(oQuery);
if (oDeleteCollection.Count > 0)
{

for (int i = oDeleteCollection.Count - 1; i > -1; i--)
{
oDeleteCollection.Delete(i);
}
}
});

}
catch (Exception ex)
{
Response.Write(ex.Message);
}

Blocking anonymous users from sharepoint lists

To block the anonymous users from viewing the sharepoint lists add the following code in your web.config file

[CODE][location path="lists"]
[system.web]
[authorization]
[deny users="?"]
[/authorization]
[/SYSTEM.WEB]
[/location][/CODE}