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);
}