add PropertyGrid v1

src/Shared/HandyControl_Shared/Tools/Converter/Object2StringConverter.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Converter
+{
+    public class Object2StringConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture) => value?.ToString();
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}