using (SPSite oSPsite = new SPSite("http://website url/"))
{
using (SPWeb oSPWeb = oSPsite.OpenWeb())
{
oSPWeb.AllowUnsafeUpdates = true;
// Fetch the List
SPList list = oSPWeb.Lists["MyList"];
//Add a new item in the List
SPListItem itemToAdd = list.Items.Add();
itemToAdd["Title"] = "Test Title";
itemToAdd["Description"] = "Test Description";
itemToAdd.Update();
// Get the Item ID
listItemId = itemToAdd.ID;
// Update the List item by ID
SPListItem itemToUpdate = list.GetItemById(listItemId);
itemToUpdate["Description"] = "Changed Description";
itemToUpdate.Update();
// Delete List item
SPListItem itemToDelete = list.GetItemById(listItemId);
itemToDelete.Delete();
oSPWeb.AllowUnsafeUpdates = false;
}
}