diff --git a/Core/NetArgumentParser/src/Options/Exceptions/OptionValueNotSatisfyChoicesException.cs b/Core/NetArgumentParser/src/Options/Exceptions/OptionValueNotSatisfyChoicesException.cs
index 0670633..f018a62 100644
--- a/Core/NetArgumentParser/src/Options/Exceptions/OptionValueNotSatisfyChoicesException.cs
+++ b/Core/NetArgumentParser/src/Options/Exceptions/OptionValueNotSatisfyChoicesException.cs
@@ -71,6 +71,6 @@ private static string GetDefaultMessage(string[] optionValue, string[] allowedVa
         string allowedValuesPresenter = string.Join(", ", allowedValues);
         
         return $"Option value '{optionValuePresenter}' not allowed. " +
-               $"It must be one of [{allowedValuesPresenter}].";
+               "It must be one of {" + allowedValuesPresenter + "}.";
     }
 }
diff --git a/Core/NetArgumentParser/src/Options/Utils/Verifiers/OptionNameCorrectnessVerifier.cs b/Core/NetArgumentParser/src/Options/Utils/Verifiers/OptionNameCorrectnessVerifier.cs
index 5f9cf23..0adbbe8 100644
--- a/Core/NetArgumentParser/src/Options/Utils/Verifiers/OptionNameCorrectnessVerifier.cs
+++ b/Core/NetArgumentParser/src/Options/Utils/Verifiers/OptionNameCorrectnessVerifier.cs
@@ -7,7 +7,7 @@ namespace NetArgumentParser.Options.Utils.Verifiers;
 
 internal static partial class OptionNameCorrectnessVerifier
 {
-    private static readonly List<string> _specialNames = [ "?" ];
+    private static readonly List<string> _reservedNames = [ "?" ];
     
     internal static void VerifyAtLeastOneNameIsDefined(string longName, string shortName)
     {
@@ -26,7 +26,7 @@ internal static void VerifyNameIsCorrect(string name)
         ArgumentNullException.ThrowIfNull(name, nameof(name));
 
         if (!string.IsNullOrEmpty(name)
-            && !_specialNames.Contains(name)
+            && !_reservedNames.Contains(name)
             && !CorrectNameRegex().IsMatch(name))
         {
             throw new IncorrectOptionNameException(null, name);
diff --git a/Tests/NetArgumentParser.Tests/src/ArgumentParserTests.cs b/Tests/NetArgumentParser.Tests/src/ArgumentParserTests.cs
index 70f04be..6d65124 100644
--- a/Tests/NetArgumentParser.Tests/src/ArgumentParserTests.cs
+++ b/Tests/NetArgumentParser.Tests/src/ArgumentParserTests.cs
@@ -1660,8 +1660,8 @@ private static void VerifyExtraArguments(
         ArgumentNullException.ThrowIfNull(actual, nameof(expected));
         ArgumentNullException.ThrowIfNull(actual, nameof(actual));
 
-        expected = expected.OrderBy(t => t);
-        actual = actual.OrderBy(t => t);
+        expected = expected.Order();
+        actual = actual.Order();
 
         Assert.True(expected.SequenceEqual(actual));
     }