title: Styling C# Alert Box
body: <p>I am very new to C#.net programming...I have a good background with Html5 and Css3 and some JavaScript...</p>
  
  <p>I am trying to figure out how to style the below alert box...I have searched the net and forums...this is my first post here...haven't been able to figure it out...</p>
  
  <p>Please let me know if you need anymore info...thank you...</p>
  
  <p>Below is the C# Code</p>
  
  <pre><code>protected void IsValidNumber(object sender, EventArgs e)
  {
  
    int num;
  
    if (Int32.TryParse(TextBox1.Text, out num))
    {
      Response.Redirect("checkin.aspx");
    }
    else
    {
      ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + TextBox1.Text + "');", true);
    }
  }
  </code></pre>