Separate the Uid using the first "." instead of the last one

For example, the Uid of "SomeButton.ToolTipService.Tooltip" should be "SomeButton".

Author: AndrewKeepCoding

WinUI3Localizer/LocalizerBuilder.cs

@@ -170,8 +170,8 @@ private static LanguageDictionary CreateLanguageDictionaryFromStringResourceItem
     private static LanguageDictionary.Item CreateLanguageDictionaryItem(StringResourceItem stringResourceItem)
     {
         string name = stringResourceItem.Name;
-        (string Uid, string DependencyPropertyName) = name.LastIndexOf(".") is int lastSeparatorIndex && lastSeparatorIndex > 1
-            ? (name[..lastSeparatorIndex], string.Concat(name.AsSpan(lastSeparatorIndex + 1), "Property"))
+        (string Uid, string DependencyPropertyName) = name.IndexOf(".") is int firstSeparatorIndex && firstSeparatorIndex > 1
+            ? (name[..firstSeparatorIndex], string.Concat(name.AsSpan(firstSeparatorIndex + 1), "Property"))
             : (name, string.Empty);
         return new LanguageDictionary.Item(
             Uid,