From e12e0858a4eee2ff4cecc40af0323bcbdaf20c76 Mon Sep 17 00:00:00 2001
From: Sergio Pedri <sergio0694@live.com>
Date: Fri, 31 Dec 2021 17:04:10 +0100
Subject: [PATCH] Fix removal of [RequiresUnreferencedCode] on older runtimes

---
 .../ComponentModel/ObservableRecipientGenerator.cs            | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservableRecipientGenerator.cs b/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservableRecipientGenerator.cs
index af972ca2..5dde87c8 100644
--- a/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservableRecipientGenerator.cs
+++ b/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservableRecipientGenerator.cs
@@ -52,7 +52,7 @@ public sealed class ObservableRecipientGenerator : TransitiveMembersGenerator<Ob
         // Check whether [RequiresUnreferencedCode] is available
         IncrementalValueProvider<bool> isRequiresUnreferencedCodeAttributeAvailable =
             context.CompilationProvider
-            .Select(static (item, _) => item.GetTypeByMetadataName("System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute") is not null);
+            .Select(static (item, _) => item.GetTypeByMetadataName("System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute") is { DeclaredAccessibility: Accessibility.Public });
 
         return
             source
@@ -128,7 +128,7 @@ public sealed class ObservableRecipientGenerator : TransitiveMembersGenerator<Ob
                     member
                     .DescendantNodes()
                     .OfType<AttributeListSyntax>()
-                    .First(node => ((IdentifierNameSyntax)((QualifiedNameSyntax)node.Attributes[0].Name).Right).Identifier.ValueText == "RequiresUnreferencedCode");
+                    .First(node => node.Attributes[0].Name is QualifiedNameSyntax { Right: IdentifierNameSyntax { Identifier.ValueText: "RequiresUnreferencedCode" } });
 
                 return member.RemoveNode(attributeNode, SyntaxRemoveOptions.KeepExteriorTrivia)!;
             }