Revert overeager pattern matching

Author: IvenBach

RetailCoder.VBE/UI/Controls/DeclarationTypeToStringConverter.cs

@@ -9,13 +9,13 @@ public class DeclarationTypeToStringConverter : IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            if (!(value is DeclarationType type))
+            if (value is DeclarationType type)
             {
-                return null;
+                var text = RubberduckUI.ResourceManager.GetString("DeclarationType_" + type, CultureInfo.CurrentUICulture) ?? string.Empty;
+                return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(text);
             }
 
-            var text = RubberduckUI.ResourceManager.GetString("DeclarationType_" + type, CultureInfo.CurrentUICulture) ?? string.Empty;
-            return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(text);
+            return null;
         }
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

RetailCoder.VBE/UI/Controls/MenuItemGroup.cs

@@ -31,33 +31,31 @@ private static void OnGroupNameChanged(DependencyObject d, DependencyPropertyCha
         {
             //Add an entry to the group name collection
 
-            if (!(d is MenuItem menuItem))
+            if (d is MenuItem menuItem)
             {
-                return;
-            }
-
-            var newGroupName = e.NewValue.ToString();
-            var oldGroupName = e.OldValue.ToString();
-            if (string.IsNullOrEmpty(newGroupName))
-            {
-                //Removing the toggle button from grouping
-                RemoveCheckboxFromGrouping(menuItem);
-            }
-            else
-            {
-                //Switching to a new group
-                if (newGroupName == oldGroupName)
+                var newGroupName = e.NewValue.ToString();
+                var oldGroupName = e.OldValue.ToString();
+                if (string.IsNullOrEmpty(newGroupName))
                 {
-                    return;
+                    //Removing the toggle button from grouping
+                    RemoveCheckboxFromGrouping(menuItem);
                 }
-
-                if (!string.IsNullOrEmpty(oldGroupName))
+                else
                 {
-                    //Remove the old group mapping
-                    RemoveCheckboxFromGrouping(menuItem);
+                    //Switching to a new group
+                    if (newGroupName == oldGroupName)
+                    {
+                        return;
+                    }
+
+                    if (!string.IsNullOrEmpty(oldGroupName))
+                    {
+                        //Remove the old group mapping
+                        RemoveCheckboxFromGrouping(menuItem);
+                    }
+                    ElementToGroupNames.Add(menuItem, e.NewValue.ToString());
+                    menuItem.Checked += MenuItemChecked;
                 }
-                ElementToGroupNames.Add(menuItem, e.NewValue.ToString());
-                menuItem.Checked += MenuItemChecked;
             }
         }
 

RetailCoder.VBE/UI/Inspections/InspectionImageSourceConverter.cs

@@ -9,7 +9,8 @@ public class InspectionImageSourceConverter : IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            if (!(value is IInspection inspection))
+            var inspection = value as IInspection;
+            if (inspection == null )
             {
                 return null;
             }