Replaced "InvariantCulture" with "Ordinal".

For our cases, it does not really matter, but using InvariantCulture makes no real sense. We don't want any linguistic rules being applied.

Author: Sedeniono

VSDoxyHighlighter/CommentParser.cs

@@ -895,21 +895,24 @@ private bool CiteOptionsValidator(int fragmentIndex, string fragmentText)
       string textWithinBraces = fragmentText.Substring(1, fragmentText.Length - 2);
 
       // Doxygen always uses a comma to separate the options, ignores whitespace and compares case-insensitively.
-      var options = textWithinBraces.Split(',').Select(o => o.Trim().ToLower(CultureInfo.InvariantCulture));
+      var options = textWithinBraces.Split(',').Select(o => o.Trim());
 
       bool foundMutuallyExclusiveOption = false;
       foreach (string option in options) {
         if (option.Length == 0) {
           continue; // Doxygen silently ignores empty entries.
         }
         // https://www.doxygen.nl/manual/commands.html#cmdcite
-        if (option == "number" || option == "shortauthor" || option == "year") {
+        if (option.Equals("number", StringComparison.OrdinalIgnoreCase)
+            || option.Equals("shortauthor", StringComparison.OrdinalIgnoreCase)
+            || option.Equals("year", StringComparison.OrdinalIgnoreCase)) {
           if (foundMutuallyExclusiveOption) {
             return false; // No syntax highlighting if multiple mutually exclusive options are found.
           }
           foundMutuallyExclusiveOption = true;
         }
-        else if (option != "nopar" && option != "nocite") {
+        else if (!option.Equals("nopar", StringComparison.OrdinalIgnoreCase)
+            && !option.Equals("nocite", StringComparison.OrdinalIgnoreCase)) {
           // Don't provide syntax highlighting for unknown options, even though Doxygen ignores them,
           // so that the user realizes the mistake.
           return false;
@@ -988,7 +991,7 @@ private int FindNextBacktickFragmentEnd(string text, int startMarkerStartIdx, in
       int startMarkerLength = startMarkerEndIdx - startMarkerStartIdx;
       Debug.Assert(startMarkerLength > 0);
       string endMarkerStr = new string('`', startMarkerLength);
-      int endMarkerStartIdx = text.IndexOf(endMarkerStr, startMarkerEndIdx, StringComparison.InvariantCulture);
+      int endMarkerStartIdx = text.IndexOf(endMarkerStr, startMarkerEndIdx, StringComparison.Ordinal);
       if (endMarkerStartIdx < 0) {
         return -1;
       }

VSDoxyHighlighter/DoxygenCommands.cs

@@ -375,7 +375,7 @@ int CompareConfigs(DoxygenCommandInConfig c1, DoxygenCommandInConfig c2)
         bool isLetter1 = char.IsLetter(c1.Command[0]);
         bool isLetter2 = char.IsLetter(c2.Command[0]);
         if ((isLetter1 && isLetter2) || (!isLetter1 && !isLetter2)) {
-          return string.Compare(c1.Command, c2.Command, StringComparison.InvariantCulture);
+          return string.Compare(c1.Command, c2.Command, StringComparison.Ordinal);
         }
         else if (isLetter1) {
           return -1;

VSDoxyHighlighter/FragmentsMatcherMarkdownEmphasis.cs

@@ -265,7 +265,7 @@ private static (int endEmphasisStartIdx, int endEmphasisEndIdx) FindEmphasisEnd(
     {
       while (searchStartIdx < searchEndIdx) {
         Debug.Assert(searchStartIdx >= 0);
-        int endEmphasisStartIdx = text.IndexOf(emphasisMarker, searchStartIdx, StringComparison.InvariantCulture);
+        int endEmphasisStartIdx = text.IndexOf(emphasisMarker, searchStartIdx, StringComparison.Ordinal);
         if (endEmphasisStartIdx < 0 || endEmphasisStartIdx >= searchEndIdx) {
           return (-1, -1);
         }