<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
Simple Calculator
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void btnAdd_Click(object sender, EventArgs e)
{
decimal a = decimal.Parse(txtFirst.Text);
decimal b = decimal.Parse(txtSecond.Text);
decimal c = a + b;
lblAnswer.Text = c.ToString();
}
}