RadioButton选中时，触发什么控件,该如何解决

RadioButton选中时，触发什么控件
在做一个winform窗体的项目，Form表单上有3个RadioButton，和一个Label，我想做成这样，当选中第一个radiobuttion时，Label.text=first,当选中第二个radiobutton时，Label.text=second。。。。

应该怎么做？

[解决办法]
双击第一个radiobuttion：
在事件里面写：
Label.text=first
双击第二个radiobuttion：
在事件里面写：
Label.text=second
[解决办法]

C# code

if(RadioButton1.Checked)   Label.Text = firstelse if(RadioButton2.Checked)   Label1.Text = secondelse if(RadioButton3.Checked)   Label1.Text = thirdelse    ...
[解决办法]
将3个RadioButton的CheckedChanged都绑定到下面的radioButton_CheckedChanged事件上。
C# code
        private void radioButton_CheckedChanged(object sender, EventArgs e)        {            RadioButton rb = sender as RadioButton;            if (rb.Text == "radioButton1")                this.label1.Text = "first";            else if (rb.Text == "radioButton2")                this.label1.Text = "secord";            else if (rb.Text == "radioButton3")                this.label1.Text = "three";        }
[解决办法]
同意LS和LSS的  我一般将3个RadioButton的click事件调用同一方法   方法里面同LSS
  if(RadioButton1.Checked)
  Label.Text = first
else if(RadioButton2.Checked)
  Label1.Text = second
else if(RadioButton3.Checked)
  Label1.Text = third

[解决办法]
        private void radioButton1_CheckedChanged(object sender, EventArgs e)
       {
           if (radioButton1.Checked)
           {
               label1.Text = "first";
           }
       }

       private void radioButton2_CheckedChanged(object sender, EventArgs e)
       {
           if (radioButton2.Checked)
           {
               label1.Text = "second";
           }
       }
[解决办法]
C# code
        private void radioButton1_CheckedChanged(object sender, EventArgs e)        {            if (radioButton1.Checked)            {                label1.Text = "first";            }        }        private void radioButton2_CheckedChanged(object sender, EventArgs e)        {            if (radioButton2.Checked)            {                label1.Text = "second";            }        }
[解决办法]
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C# code

if(RadioButton1.Checked)
   Label.Text = first
else if(RadioButton2.Checked)
   Label1.Text = second
else if(RadioButton3.Checked)
   Label1.Text = third
else 
   ...

[解决办法]
 private void radioButton1_CheckedChanged(object sender, EventArgs e)
       {
           if (radioButton1.Checked)
           {
               label1.Text = "first";
           }
       }