diff --git a/src/TypeNameInterpretation/FrameworkExtensions/SpanExtensions.cs b/src/TypeNameInterpretation/FrameworkExtensions/SpanExtensions.cs
new file mode 100644
index 0000000..7996ec1
--- /dev/null
+++ b/src/TypeNameInterpretation/FrameworkExtensions/SpanExtensions.cs
@@ -0,0 +1,11 @@
+// Copyright (c) Brian Reichle.  All Rights Reserved.  Licensed under the MIT License.  See LICENSE in the project root for license information.
+
+#if !NET
+namespace System;
+
+static class SpanExtensions
+{
+	public static bool ContainsAny(this ReadOnlySpan<char> haystack, ReadOnlySpan<char> needle)
+		=> haystack.IndexOfAny(needle) >= 0;
+}
+#endif
diff --git a/src/TypeNameInterpretation/InsFormatter.cs b/src/TypeNameInterpretation/InsFormatter.cs
index 6aa54d6..67d8525 100644
--- a/src/TypeNameInterpretation/InsFormatter.cs
+++ b/src/TypeNameInterpretation/InsFormatter.cs
@@ -31,7 +31,7 @@ public static string Format(InsAssembly assembly)
 	{
 		ArgumentNullException.ThrowIfNull(assembly);
 
-		if (assembly.Qualifications.Length == 0 && assembly.Name.AsSpan().IndexOfAny(Delimiters.All) < 0)
+		if (assembly.Qualifications.Length == 0 && !assembly.Name.AsSpan().ContainsAny(Delimiters.All))
 		{
 			return assembly.Name;
 		}
@@ -188,7 +188,7 @@ static void WriteWithEscapedDelimiters(StringBuilder builder, string identifier,
 		}
 
 		static bool RequiresQuoting(string identifier)
-			=> string.IsNullOrEmpty(identifier) || identifier.AsSpan().IndexOfAny(Delimiters.All) >= 0;
+			=> string.IsNullOrEmpty(identifier) || identifier.AsSpan().ContainsAny(Delimiters.All);
 	}
 
 	sealed class AssemblyLocator : IInsTypeVisitor<object, InsAssembly?>