c# - Update textblock to value of variable in WPF -

edit: want update value of textblock value of random variable generated periodically on class.

my implementation blocking other features in app (buttons). suggestion?

   public partial class mainwindow : window {     taskviewmodel viewmodel = new taskviewmodel();      public mainwindow()     {         this.datacontext = viewmodel;         initializecomponent();         server_v2.asyncservice.runmain();         displayav();     }      //display availability     private async void displayav() {         while (true) {             //availabilityfield.text = server_v2.av.tostring();             viewmodel.availability = server_v2.av.tostring();             await task.delay(500);         }     }      public class taskviewmodel : inotifypropertychanged     {         private string availabilty = "0";         public string availability         {             { return availabilty; }             set { availabilty = value; onstaticpropertychanged();}         }         public event propertychangedeventhandler propertychanged;         public void onstaticpropertychanged([callermembername] string propertyname = null)         {             propertychanged?.invoke(this, new propertychangedeventargs(propertyname));         }     } 

you should use background worker. async code still runs on main thread.

like this...

    backgroundworker worker = new backgroundworker();     public mainwindow()     {         this.datacontext = viewmodel;         initializecomponent();         server_v2.asyncservice.runmain();         worker.dowork += worker_dowork;         worker.runworkerasync();     }      private void worker_dowork(object sender, doworkeventargs e)     {         while (true)         {             //availabilityfield.text = server_v2.av.tostring();             viewmodel.availability = server_v2.av.tostring();             thread.sleep(500);         }     }