C# Checking if button was clicked

Question

I am making a program that should just continue if 2 conditions are given.

The first one, 2 TextBoxs have the same word in and a Button wa

Answer 1

button1, button2 and button3 have same even handler

private void button1_Click(Object sender, EventArgs e)
    {
        Button btnSender = (Button)sender;
        if (btnSender == button1 || btnSender == button2)
        {
            //some code here
        }
        else if (btnSender == button3)
            //some code here
    }