.NET Workflows - Introduce support for Local variable scope (#944)

* Prepare for update

* Checkpoint

* Comments

* All fixed

* Mixed casre test added

* Rollback nuget

* Remove redundant restorable

* Namespace

workflow-samples/HumanInLoop.yaml

@@ -14,14 +14,14 @@ trigger:
     # Capture original input
     - kind: SetVariable
       id: set_project
-      variable: Topic.OriginalInput
+      variable: Local.OriginalInput
       value: =System.LastMessage.Text
 
     # Request input from user
     - kind: Question
       id: question_confirm
       alwaysPrompt: false
-      property: Topic.ConfirmedInput
+      property: Local.ConfirmedInput
       prompt:
         kind: Message
         text:
@@ -35,14 +35,14 @@ trigger:
       conditions:
 
         # Didn't match
-        - condition: =Topic.OriginalInput <> Topic.ConfirmedInput
+        - condition: =Local.OriginalInput <> Local.ConfirmedInput
           id: check_confirm
           actions:
 
             - kind: SendActivity
               id: sendActivity_mismatch
               activity: |-
-                "{Topic.ConfirmedInput}" does not match the original input of "{Topic.OriginalInput}". Please try again.
+                "{Local.ConfirmedInput}" does not match the original input of "{Local.OriginalInput}". Please try again.
 
             - kind: GotoAction
               id: goto_again
@@ -54,10 +54,10 @@ trigger:
           id: sendActivity_confirmed
           activity: |-
             You entered:
-            {Topic.OriginalInput}
+            {Local.OriginalInput}
 
             Confirmed input:
-            {Topic.ConfirmedInput}
+            {Local.ConfirmedInput}