From 0d0e88a61bb2ec7ce76e8990dd3833b9870f7d96 Mon Sep 17 00:00:00 2001
From: Siegfried Pammer <siegfriedpammer@gmail.com>
Date: Sat, 8 Aug 2026 14:53:46 +0200
Subject: [PATCH] Gate SwitchOnReadOnlySpanChar on C# 11.0

The setting carried the C# 11.0 display category but was missing from
both SetLanguageVersion and GetMinimumRequiredVersion, so decompiling
for an older target language version could still produce switches over
ReadOnlySpan<char> that the requested compiler cannot compile. Gating
it like the other C# 11.0 settings closes that gap; the category string
is now derived from the version like everywhere else.

Assisted-by: Claude:claude-fable-5:Claude Code
---
 ICSharpCode.Decompiler/DecompilerSettings.cs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/ICSharpCode.Decompiler/DecompilerSettings.cs b/ICSharpCode.Decompiler/DecompilerSettings.cs
index a8f6322ca..79112cb98 100644
--- a/ICSharpCode.Decompiler/DecompilerSettings.cs
+++ b/ICSharpCode.Decompiler/DecompilerSettings.cs
@@ -483,9 +483,8 @@ namespace ICSharpCode.Decompiler
 		/// <summary>
 		/// Gets/Sets whether to use C# 11.0 switch on (ReadOnly)Span&lt;char&gt;
 		/// </summary>
-		[Category("C# 11.0 / VS 2022.4")]
 		[Description("DecompilerSettings.SwitchOnReadOnlySpanChar")]
-		[DecompilerSetting]
+		[DecompilerSetting(CSharp.LanguageVersion.CSharp11_0)]
 		public partial bool SwitchOnReadOnlySpanChar { get; set; }
 
 		/// <summary>