Simple Example of Singleton Design Pattern in C# Example

Simple Example of Singleton Design Pattern in C# Example


UI Code:
 ApplicationState state = ApplicationState.GetState();
            state.LoginId="Kanchan";
            state.RoleId= "Admin";
         
            ApplicationState state2 = ApplicationState.GetState();
            label3.Text = state2.LoginId;
            label5.Text = state2.RoleId;
            label6.Text = (state == state2).ToString();

Singleton Class Code:
 class ApplicationState
    {
        private static ApplicationState instance=null;
        // State Information  
        public string LoginId
        { get; set;}
        public string RoleId
        { get; set; }
   
        private ApplicationState()
        {        
        }
        //Lock Object
        private static object lockThis = new object();
        public static ApplicationState GetState()  
        {
            lock (lockThis)      
            {          

                if (ApplicationState.instance == null)
                  instance = new ApplicationState();      
            }      
                return instance;            
        }  
     
    }