progressbar mvvm

PacticeSolution/ProgressBarMVVMSample/Model/BindableBase.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProgressBarMVVMSample.Model
+{
+    internal class BindableBase : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        protected bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
+        {
+            if (Equals(storage, value)) 
+                return false;
+
+            storage = value;
+            this.OnPropertyChanged(propertyName);
+            return true;
+        }
+
+        private void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            if (this.PropertyChanged == null)
+                return;
+
+            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}