Infört Observable Property och observable object från Community Toolkit

GreadyPoang.ViewModelLayer/ViewModelClasses/MethodSharingService.cs

@@ -1,10 +1,11 @@
 using Common.Library;
+using CommunityToolkit.Mvvm.ComponentModel;
 using GreadyPoang.EntityLayer;
 using System.Collections.ObjectModel;
 
 namespace GreadyPoang.ViewModelLayer;
 
-public class MethodSharingService : ViewModelBase, IMethodSharingService<Participant>
+public class MethodSharingService : ObservableObject, IMethodSharingService<Participant>
 {
     private readonly IRepository<Participant> _repository;