instead of contactname i have to get contact mobile number in asp.net mvc4,please some give me any ideas

@{
if (IsPost) { 
string companyname = Request["CompanyName"]; 
string contactname = Request["ContactName"]; 
<p>You entered: <br />
Company Name: @companyname <br />
Contact Name: @contactname </p>
}

//In above code, i have to get company mobile number instead of contact name.