namespace SilverlightTests.RiaYeKe
{
  public static class PersianHelper
  {
      public static string ApplyUnifiedYeKe(this string data)
      {
          if (string.IsNullOrEmpty(data)) return data;
          return data.Replace("ی", "ی").Replace("ک", "ک");
      }
  }
}

using System.Linq;
using System.Windows.Controls;
using System.Reflection;
using System.ServiceModel.DomainServices.Client;

namespace SilverlightTests.RiaYeKe
{
  public class RIAHelper
  {
      /// <summary>
      /// یک دست سازی ی و ک در عبارات ثبت شده در بانک اطلاعاتی پیش از ورود به آن
      /// این متد باید پیش از فراخوانی متد
      /// SubmitChanges
      /// استفاده شود
      /// </summary>
      /// <param name="dds"></param>
      public static void ApplyCorrectYeKe(DomainDataSource dds)
      {
          if (dds == null)
              return;

          if (dds.DataView.TotalItemCount <= 0)
              return;

          //پیدا کردن موجودیت‌های تغییر کرده
          var changedEntities = dds.DomainContext.EntityContainer.GetChanges().Where(
              c => c.EntityState == EntityState.Modified ||
                   c.EntityState == EntityState.New);

          foreach (var entity in changedEntities)
          {
              //یافتن خواص این موجودیت‌ها
              var propertyInfos = entity.GetType().GetProperties(
                      BindingFlags.Public | BindingFlags.Instance
                      );

              foreach (var propertyInfo in propertyInfos)
              {
                  //اگر این خاصیت رشته‌ای است ی و ک آن را استاندارد کن
                  if (propertyInfo.PropertyType != typeof (string)) continue;
                  var propName = propertyInfo.Name;                      
                  var val = new PropertyReflector().GetValue(entity, propName);
                  if (val == null) continue;
                  new PropertyReflector().SetValue(
                      entity,
                      propName,
                      val.ToString().ApplyUnifiedYeKe());
              }
          }
      }
  }
}

Microsoft's release notes highlights for Preview 3 include:

• Visual Studio now offers .NET Framework 4.7.2 development tools to supported platforms with 4.7.2 runtime included.
• We improved performance during project unload/reload and branch switching.
• With added support for Azure Functions, you now have a new target host in the Configure Continuous Delivery to Azure dialog.
• Git and TFS status now updates properly for external file changes in .NET Core projects.
• We added new productivity features, such as code cleanup, invert-if refactoring, Go to Enclosing Block, Multi-Caret support, and new keyboard profiles.
• C++ enhancements include Template IntelliSense, convert macro to constexpr lightbulbs, and experimental in-editor code analysis squiggles.
• You can now use cross-language debugging with Python 3.7.0rc1.
• Performance Profiling now offers the ability to pause/resume data collection and adds a new .NET Object Allocation Tracking tool.
• We included improvements for Android incremental builds in the Xamarinsupport for Xcode 9.4.
•