C# SqlDependency not working
<p>i created a SqlDependency when i run the application it working onchange event one  time after that it is not working (I change the a value from sqlmanegement studio) </p>

<pre><code>SqlCommand cmd = new SqlCommand("Select Id,FaturaNo from Stok", SK.Connection);

SqlClientPermission perm = new SqlClientPermission(PermissionState.Unrestricted);

perm.Demand();

SqlDependency.Start(SK.Connection.ConnectionString);

SqlDependency Dep = new SqlDependency(cmd);

Dep.OnChange += new OnChangeEventHandler(Dep_OnChange);

SqlDataAdapter adap = new SqlDataAdapter(cmd);

DataSet a = new DataSet();

adap.Fill(a);

gridControl1.DataSource = a.Tables[0];
</code></pre>
