public void Add() { if(!Validation.IsValidUserName(this.UserName)) { this._parent.DisplayError("Invalid username provided. Usernames must be between 1-20 alpha-numeric characters.", this); } var serviceClient = new ChatServiceClient(Config.ServiceEndpointName); var response = serviceClient.SendFriendRequest(this._parent.MainViewModel.UserName, this.UserName); // TODO: Verify reponse and handle any errors. this._parent.MainViewModel.MessageText += $"Friend request was successfully sent to {this.UserName}!\n"; this._parent.ShowPage(this._parent.MainViewModel, this); }