public async Task SaveTaskAsync (Customers item)
		{
			if (item.ID == null)
				await custTable.InsertAsync(item);
			else
				await custTable.UpdateAsync(item);
		}
		public async Task DeleteTaskAsync (Customers item)
		{
			try 
			{
				await custTable.DeleteAsync(item);
			} 
			catch (MobileServiceInvalidOperationException msioe)
			{
				Debug.WriteLine(@"INVALID {0}", msioe.Message);
			}
			catch (Exception e) 
			{
				Debug.WriteLine(@"ERROR {0}", e.Message);
			}
		}