CheckBox gold=(CheckBox)e.Item.FindControl("ckGold");
CheckBox silver=((CheckBox)e.Item.FindControl("ckSilver"));
silver.Checked=false;
else if(silver.Checked==true)
gold.Checked=false;
else
Page.RegisterStartupScript("Statrup","<script>alert('Please Select Any One Status.....');</script>");------------------------------------------------------Above code to be displayed one error:'Object Reference to be set an instance of an object'What's the solution this? Thank u