Saving last Release Stream in Registry

EZPPClient Installer/Utils/RegistryUtil.cs

@@ -0,0 +1,41 @@
+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EZPPClient_Installer.Utils
+{
+  class RegistryUtil
+  {
+
+    public static void SetUsedReleaseStream(string release)
+    {
+      RegistryKey key = Registry.CurrentUser.CreateSubKey(@"SOFTWARE\EZPPClientInstaller");
+      key.SetValue("ReleaseStream", release);
+      key.Close();
+    }
+
+    public static String GetUsedReleaseStream(string defaultRelease)
+    {
+      string release = defaultRelease;
+      RegistryKey key = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\EZPPClientInstaller");
+
+      //if it does exist, retrieve the stored values  
+      if (key != null)
+      {
+        release = (string) key.GetValue("ReleaseStream");
+        key.Close();
+      }
+
+      return release;
+    }
+
+    public static void DeleteUsedReleaseStream()
+    {
+      Registry.CurrentUser.DeleteSubKey(@"SOFTWARE\EZPPClientInstaller");
+    }
+
+  }
+}