how to apply validation in html radio button control?

Question

Hi,

I am using HTML 5 control in mvc view but i dont no how to set the required field validation....show below code....

 

<input type="radio"  name="payment" value="C" @( this.Model.paymode == "C" ? "Checked" : "") />

<input type="radio"  name="payment" value="O" @( this.Model.paymode == "O" ? "Checked" : "") />

 

 @html.validationmessagefor(x=>x.paymode)

 

I am using code but not done. how to set validation of that control. Please help me.

 

thanks in advance