Hide switch on string dictionary fields generated by mcs

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -95,6 +95,8 @@ namespace ICSharpCode.Decompiler.Ast
 					if (settings.AnonymousMethods && IsAnonymousMethodCacheField(field))
 						return true;
 					if (settings.AutomaticProperties && IsAutomaticPropertyBackingField(field))
+						return true;
+					if (settings.SwitchStatementOnString && IsSwitchOnStringCache(field))
 						return true;
 				}
 				// event-fields are not [CompilerGenerated]
@@ -105,6 +107,11 @@ namespace ICSharpCode.Decompiler.Ast
 			return false;
 		}
 
+		static bool IsSwitchOnStringCache(FieldDefinition field)
+		{
+			return field.Name.StartsWith("<>f__switch", StringComparison.Ordinal);
+		}
+
 		static bool IsAutomaticPropertyBackingField(FieldDefinition field)
 		{
 			return field.HasGeneratedName() && field.Name.EndsWith("BackingField", StringComparison.Ordinal);