XS202010226324/DataDisplayBoard/ViewModel/BaseViewModel.cs

using System;
using System.ComponentModel;

namespace DataDisplayBoard.ViewModel
{
    public class BaseViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        public void OnPropertyChanged(string PropertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(PropertyName));
        }
    }
}