diff --git a/src/Facility.Definition/CodeGen/CodeGenUtility.cs b/src/Facility.Definition/CodeGen/CodeGenUtility.cs
index 4906111..df0d33e 100644
--- a/src/Facility.Definition/CodeGen/CodeGenUtility.cs
+++ b/src/Facility.Definition/CodeGen/CodeGenUtility.cs
@@ -15,7 +15,7 @@ public static class CodeGenUtility
 	/// <summary>
 	/// Capitalizes the specified string.
 	/// </summary>
-#if NET6_0_OR_GREATER
+#if !NETSTANDARD2_0
 	public static string Capitalize(string value) => value.Length == 0 ? value : string.Concat(value[..1].ToUpperInvariant(), value.AsSpan(1));
 #else
 	public static string Capitalize(string value) => value.Length == 0 ? value : value.Substring(0, 1).ToUpperInvariant() + value.Substring(1);
@@ -24,7 +24,7 @@ public static class CodeGenUtility
 	/// <summary>
 	/// Uncapitalizes the specified string.
 	/// </summary>
-#if NET6_0_OR_GREATER
+#if !NETSTANDARD2_0
 	public static string Uncapitalize(string value) => value.Length == 0 ? value : string.Concat(value[..1].ToLowerInvariant(), value.AsSpan(1));
 #else
 	public static string Uncapitalize(string value) => value.Length == 0 ? value : value.Substring(0, 1).ToLowerInvariant() + value.Substring(1);
diff --git a/src/Facility.Definition/Fsd/FsdParsers.cs b/src/Facility.Definition/Fsd/FsdParsers.cs
index 15bb857..7609213 100644
--- a/src/Facility.Definition/Fsd/FsdParsers.cs
+++ b/src/Facility.Definition/Fsd/FsdParsers.cs
@@ -223,7 +223,7 @@ private static string DecodeBackslash(string text) =>
 			'n' => "\n",
 			'r' => "\r",
 			't' => "\t",
-#if NET6_0_OR_GREATER
+#if !NETSTANDARD2_0
 			'u' => new string((char) ushort.Parse(text.AsSpan(2), NumberStyles.HexNumber, CultureInfo.InvariantCulture), 1),
 #else
 			'u' => new string((char) ushort.Parse(text.Substring(2), NumberStyles.HexNumber, CultureInfo.InvariantCulture), 1),
diff --git a/src/Facility.Definition/Regexes.cs b/src/Facility.Definition/Regexes.cs
index 3745bdd..f95bcf2 100644
--- a/src/Facility.Definition/Regexes.cs
+++ b/src/Facility.Definition/Regexes.cs
@@ -8,7 +8,7 @@ internal static partial class Regexes
 {
 	private const string c_wordPattern = "[A-Z]([A-Z]*(?![a-z])|[a-z]*)|[a-z]+|[0-9]+";
 	private const RegexOptions c_wordOptions = RegexOptions.CultureInvariant | RegexOptions.ExplicitCapture;
-#if NET7_0_OR_GREATER
+#if !NETSTANDARD2_0
 	[GeneratedRegex(c_wordPattern, c_wordOptions)]
 	public static partial Regex Word();
 #else
diff --git a/src/Facility.Definition/ServiceDefinitionUtility.cs b/src/Facility.Definition/ServiceDefinitionUtility.cs
index 4b536e7..044b9c1 100644
--- a/src/Facility.Definition/ServiceDefinitionUtility.cs
+++ b/src/Facility.Definition/ServiceDefinitionUtility.cs
@@ -49,7 +49,7 @@ internal static ServiceDefinitionError CreateInvalidAttributeValueError(string a
 
 	internal static IReadOnlyList<T> ToReadOnlyList<T>(this IEnumerable<T>? items) => new ReadOnlyCollection<T>((items ?? []).ToList());
 
-#if NET6_0_OR_GREATER
+#if !NETSTANDARD2_0
 	internal static bool ContainsOrdinal(this string text, string value) => text.Contains(value, StringComparison.Ordinal);
 	internal static string ReplaceOrdinal(this string text, string oldValue, string newValue) => text.Replace(oldValue, newValue, StringComparison.Ordinal);
 #else