PixiEditor/PixiEditor.UpdateInstaller/ViewModelBase.cs

using System.ComponentModel;

namespace PixiEditor.UpdateInstaller
{
    public class ViewModelBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged = (sender, e) => { };

        protected void RaisePropertyChanged(string property)
        {
            if (property != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(property));
            }
        }
    }
}