using System.ComponentModel; using System.Runtime.CompilerServices; namespace WpfEngineeringSketch.ViewModels { public class ViewModelBase : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); } protected bool SetProperty(ref T storage, T value, [CallerMemberName] string propertyName = null) { if (object.Equals(storage, value)) return false; storage = value; OnPropertyChanged(propertyName); return true; } } }