Throw exception when a not multiple instance template has been renamed

code/src/Wizard/Steps/ConsumerFeatures/NewConsumerFeature/NewConsumerFeatureViewModel.cs

@@ -58,9 +58,7 @@ namespace Microsoft.Templates.Wizard.Steps.ConsumerFeatures.NewConsumerFeature
             {
                 SetProperty(ref _itemName, value);
 
-                var validationResult = Naming.Validate(_selectedNames, value);
-
-                HandleValidation(validationResult);
+                Validate(value);
 
                 OnPropertyChanged(nameof(OkCommand));
             }
@@ -126,6 +124,19 @@ namespace Microsoft.Templates.Wizard.Steps.ConsumerFeatures.NewConsumerFeature
             }
         }
 
+        private void Validate(string value)
+        {
+            //TODO: CREATE VALIDATION ERROR CLASS
+            if (!TemplateSelected.MultipleInstances)
+            {
+                throw new Exception(Strings.ValidationError_RenameNotAllowed);
+            }
+
+            var validationResult = Naming.Validate(_selectedNames, value);
+
+            HandleValidation(validationResult);
+        }
+
         private bool IsValid() => _isValid;
     }
 }

code/src/Wizard/Steps/ConsumerFeatures/Strings.Designer.cs

@@ -159,6 +159,15 @@ namespace Microsoft.Templates.Wizard.Steps.ConsumerFeatures {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Cannot set a custom name.
+        /// </summary>
+        public static string ValidationError_RenameNotAllowed {
+            get {
+                return ResourceManager.GetString("ValidationError_RenameNotAllowed", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Name is reserved.
         /// </summary>

code/src/Wizard/Steps/ConsumerFeatures/Strings.resx

@@ -150,6 +150,9 @@
   <data name="ValidationError_Empty" xml:space="preserve">
     <value>Name cannot be empty</value>
   </data>
+  <data name="ValidationError_RenameNotAllowed" xml:space="preserve">
+    <value>Cannot set a custom name</value>
+  </data>
   <data name="ValidationError_ReservedName" xml:space="preserve">
     <value>Name is reserved</value>
   </data>

code/src/Wizard/Steps/DevFeatures/NewDevFeature/NewDevFeatureViewModel.cs

@@ -58,9 +58,7 @@ namespace Microsoft.Templates.Wizard.Steps.DevFeatures.NewDevFeature
             {
                 SetProperty(ref _itemName, value);
 
-                var validationResult = Naming.Validate(_selectedNames, value);
-
-                HandleValidation(validationResult);
+                Validate(value);
 
                 OnPropertyChanged(nameof(OkCommand));
             }
@@ -125,6 +123,19 @@ namespace Microsoft.Templates.Wizard.Steps.DevFeatures.NewDevFeature
             }
         }
 
+        private void Validate(string value)
+        {
+            //TODO: CREATE VALIDATION ERROR CLASS
+            if (!TemplateSelected.MultipleInstances)
+            {
+                throw new Exception(Strings.ValidationError_RenameNotAllowed);
+            }
+
+            var validationResult = Naming.Validate(_selectedNames, value);
+
+            HandleValidation(validationResult);
+        }
+
         private bool IsValid() => _isValid;
     }
 }

code/src/Wizard/Steps/DevFeatures/Strings.Designer.cs

@@ -159,6 +159,15 @@ namespace Microsoft.Templates.Wizard.Steps.DevFeatures {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Cannot set a custom name.
+        /// </summary>
+        public static string ValidationError_RenameNotAllowed {
+            get {
+                return ResourceManager.GetString("ValidationError_RenameNotAllowed", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Name is reserved.
         /// </summary>

code/src/Wizard/Steps/DevFeatures/Strings.resx

@@ -150,6 +150,9 @@
   <data name="ValidationError_Empty" xml:space="preserve">
     <value>Name cannot be empty</value>
   </data>
+  <data name="ValidationError_RenameNotAllowed" xml:space="preserve">
+    <value>Cannot set a custom name</value>
+  </data>
   <data name="ValidationError_ReservedName" xml:space="preserve">
     <value>Name is reserved</value>
   </data>

code/src/Wizard/Steps/Pages/NewPage/NewPageViewModel.cs

@@ -56,15 +56,13 @@ namespace Microsoft.Templates.Wizard.Steps.Pages.NewPage
             {
                 SetProperty(ref _itemName, value);
 
-                var validationResult = Naming.Validate(_selectedNames, value);
-
-                HandleValidation(validationResult);
+                Validate(value);
 
                 OnPropertyChanged(nameof(OkCommand));
             }
         }
 
-         //TODO: MAKE THIS METHOD TRULY ASYNC
+        //TODO: MAKE THIS METHOD TRULY ASYNC
         public async Task InitializeAsync()
         {
             Templates.Clear();
@@ -114,6 +112,19 @@ namespace Microsoft.Templates.Wizard.Steps.Pages.NewPage
             }
         }
 
+        private void Validate(string value)
+        {
+            //TODO: CREATE VALIDATION ERROR CLASS
+            if (!TemplateSelected.MultipleInstances)
+            {
+                throw new Exception(Strings.ValidationError_RenameNotAllowed);
+            }
+
+            var validationResult = Naming.Validate(_selectedNames, value);
+
+            HandleValidation(validationResult);
+        }
+
         private bool IsValid() => _isValid;
     }
 }

code/src/Wizard/Steps/Pages/Strings.Designer.cs

@@ -150,6 +150,15 @@ namespace Microsoft.Templates.Wizard.Steps.Pages {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Cannot set a custom name.
+        /// </summary>
+        public static string ValidationError_RenameNotAllowed {
+            get {
+                return ResourceManager.GetString("ValidationError_RenameNotAllowed", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Name is reserved.
         /// </summary>

code/src/Wizard/Steps/Pages/Strings.resx

@@ -147,6 +147,9 @@
   <data name="ValidationError_Empty" xml:space="preserve">
     <value>Name cannot be empty</value>
   </data>
+  <data name="ValidationError_RenameNotAllowed" xml:space="preserve">
+    <value>Cannot set a custom name</value>
+  </data>
   <data name="ValidationError_ReservedName" xml:space="preserve">
     <value>Name is reserved</value>
   </data>