On button click you can try the following.
protected void button1_Click(object sender, EventArgs e)
{
Response.Redirect("~/Admin/Admin.aspx");
}
And on PageLoad you can check whether the loading is coming from that button then increase the count.
protected void Page_Load(object sender, EventArgs e)
{
StackTrace stackTrace = new StackTrace();
string eventName = stackTrace.GetFrame(1).GetMethod().Name; // this will the event name.
if (eventName == "button1_Click")
{
// code to increase the count;
}
}
Thanks