Multiple Button Click using a single Function

.aspx page:
-=--------
First counter:
div>
asp:Button ID="Button1" runat="server" Text="0" onclick="Button1_Click" />
Second Counter:
asp:Button ID="Button2" onclick="Button1_Click" runat="server" Text="0" />
/div>

.ascx page:
-----------
protected void Button1_Click(object sender , EventArgs e)
{
Button myButton = (Button)sender;
myButton.Text = (Int32.Parse(myButton.Text) + 1).ToString();


}