Clean way to maintain Session in a single class in ASP.Net application

We can use a wrapper class around the ASP.NET session to maintain session in a single class in ASP.Net application. This class stores one instance of itself in the ASP.NET session and allows you to access your session properties in a type-safe way from any class. Check the below code,

public sealed class Sessions : System.Web.UI.Page
{
     private const string SESSION_MANAGER = "PROJECTNAME_SESSION_OBJECT";

     private Sessions()
     {
          //You can initialize any variables here.
     }

     public static Sessions Current
     {
          get
          {
               Sessions session = (Sessions)HttpContext.Current.Session[SESSION_MANAGER];
               if (session == null)
               {
                     session = new Sessions();
                     HttpContext.Current.Session[SESSION_MANAGER] = session;
               }

               return session;
          }
     }

     // properties
     public string Username{ get; set; }
     public DateTime LoggedinDtae { get; set; }
     public int UserId { get; set; }
}

And you can access those session properties like below,

     //to get UserId
     int userId= Sessions.Current.UserId;
     //to set UserId
     Sessions.Current.UserId = 101;

     //to get Username
     string username= Sessions.Current.Username;
     //to set Username
     Sessions.Current.Username = "test name";

     //to get LoggedinDate
     DateTime loggedinDate = Sessions.Current.LoggedinDate;
     //to set LoggedinDate
     Sessions.Current.LoggedinDate= DateTime.Now;