Disallow readonly on events with associated fields

dotnet · Feb 27, 2019 · 7da2c02 · 7da2c02
1 parent ee3228a
commit 7da2c02
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Compilers/CSharp/Portable/Symbols/Source/SourceEventSymbol.cs b/src/Compilers/CSharp/Portable/Symbols/Source/SourceEventSymbol.cs
@@ -478,7 +478,7 @@ protected void CheckModifiersAndType(DiagnosticBag diagnostics)
                 // A static member '{0}' cannot be marked as override, virtual, or abstract
                 diagnostics.Add(ErrorCode.ERR_StaticNotVirtual, location, this);
             }
-            else if (IsStatic && IsReadOnly)
+            else if (IsReadOnly && (IsStatic || HasAssociatedField))
             {
                 // The modifier '{0}' is not valid for this item
                 diagnostics.Add(ErrorCode.ERR_BadMemberFlag, location, SyntaxFacts.GetText(SyntaxKind.ReadOnlyKeyword));