How can I subscribe multiple buttons to the same event handler and act according to what button was clicked?

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You can attach the same event to multiple buttons by binding the same method to each buttons click event

myButton1.Click += new MyButtonClick;
myButton2.Click += new MyButtonClick;
myButton3.Click += new MyButtonClick;
myButton4.Click += new MyButtonClick;
myButton5.Click += new MyButtonClick;
myButton6.Click += new MyButtonClick;

void MyButtonClick(object sender, EventArgs e)
{
    Button button = sender as Button;
    //here you can check which button was clicked by the sender
}

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