asp .net: Creating NameSpace

Step 1: Creating Namespace class in App_Code (cs or vb)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace YOURNAMESPACENAME
{
///

/// Summary description for of Class
///

public class YOURCLASSNAME
{
//METHODS AND VALUES - PUBLIC
}
}

Step 2: Calls your namespace in aspx.cs class

using YOURNAMESPACENAME;

create new object in Main class for YOURCLASSNAME -
YOURCLASSNAME ClassName = new YOURCLASSNAME ();

Now call your methods and values, etc:
ClassName.MethodName()