Screen Shot Coding 1. Design Coding Sample Text Change Event for Auto-Calculations Auto Calculations Press Tab here to generate auto calculate values 2. Code Behind using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void TextBox2_TextChanged(object sender, EventArgs e) { if (TextBox1.Text == " ") { TextBox1.Text = "Enter Some values here"; } else {...