Software developer can use System.Web.SessionState.HttpSessionState member Count which returns the number of items in the current session collection. Related TutorialsHow to create a simple content page in ASP.NET How to use XmlTextWriter formatting in C# How to use XmlTextReader to read XML file as text in C# How to test a web service in ASP.NET How to manage the ASP.NET web service data caching in C#