Error using session in WCF Service

Question

I am using the below sample function in wcf project. It's working fine internally. When i am calling this function from outside of the hosted service. It returns the error.

Object reference not set to be an instance of an object.

I find that line HttpContext.Current.Session["UserSession"] // Error Code

try
{
    if (HttpContext.Current.Session["UserSession"] != null)
    {

    }
    else
    {

    }
}
catch(Exception ex)
{
    return ex.Message;
}

But i want to user the session variable. Please help me to solve this.

Answer 1

Try this :

if (HttpContext.Current.Session.Contains("UserSession"))
{
  if (HttpContext.Current.Session["UserSession"] != null)
  {

  } 
} 

Answer 2

It means your session variable is empty. Try using cache instead of session as session value is different for all pc's