Comments by Rocker-Star (Top 10 by date)

I am not sure why a server is needed here, anyways I would go for the same implementation as btnSend_Click() on the server application as well . Definitely you would expect an event for the server form to show, trap that event and implement btnSend_Click().

Hope this helps !!

you have to escape single quote (') by adding one more single quote ('') in sql server as it is one of its literals.
try the following
declare @phone varchar(50)
set @phone='sdf%d''ff$%'

Looking at your code, you have not instantiated the list.

Create the list on the first line List<log> = new List(). That will create a new list and you do not need a remove all call, as the list is already empty.

I would be using Session object instead, there is no point in adding Application object and removing it. at what point do you add the Login key on to your application object?