In this tutorials will teach you how to add two number using OOP concepts. This is an important for developing a c# projects. there are many students who struggling with this area. so that I bring this article for all to clear the doubts.
After that you have to create the class Cal.cs
class Cal { public int num1, num2,tot; public int Add() { tot = num1 + num2; return tot; } }
Cal c = new Cal(); c.num1 = int.Parse(txtNum1.Text); c.num2 = int.Parse(txtNum2.Text); label3.Text = c.Add().ToString();
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