Move string to resource

src/VisualStudio/Core/Def/Implementation/ChangeSignature/ChangeSignatureDialogViewModel.cs

@@ -439,7 +439,7 @@ internal bool TrySubmit()
 
             if (!canSubmit)
             {
-                _notificationService.SendNotification("You must change the signature.", severity: NotificationSeverity.Information);
+                _notificationService.SendNotification(ServicesVSResources.You_must_change_the_signature, severity: NotificationSeverity.Information);
                 return false;
             }
 

src/VisualStudio/Core/Def/ServicesVSResources.Designer.cs

@@ -3713,6 +3713,15 @@ internal class ServicesVSResources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to You must change the signature.
+        /// </summary>
+        internal static string You_must_change_the_signature {
+            get {
+                return ResourceManager.GetString("You_must_change_the_signature", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to You must select at least one member..
         /// </summary>

src/VisualStudio/Core/Def/ServicesVSResources.resx

@@ -1389,4 +1389,12 @@ I agree to all of the foregoing:</value>
   <data name="Type_Name" xml:space="preserve">
     <value>Type Name</value>
   </data>
+  <data name="Live_Share_CSharp_Visual_Basic_Language_Server_Client" xml:space="preserve">
+    <value>Live Share C#/Visual Basic Language Server Client</value>
+    <comment>'Live Share' is a product name and does not need to be localized.</comment>
+  </data>
+  <data name="You_must_change_the_signature" xml:space="preserve">
+    <value>You must change the signature</value>
+    <comment>"signature" here means the definition of a method</comment>
+  </data>
 </root>
\ No newline at end of file