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title description ms.date ms.topic f1_keywords helpviewer_keywords author ms.author manager ms.subservice monikerRange
CA2221: Finalizers should be protected
A public type implements a finalizer that does not specify family (protected) access.
10/16/2019
reference
CA2221
FinalizersShouldBeProtected
FinalizersShouldBeProtected
CA2221
mikejo5000
mikejo
mijacobs
code-analysis
vs-2019

CA2221: Finalizers should be protected

Item Value
RuleId CA2221
Category Microsoft.Usage
Breaking change Non-breaking

Cause

A public type implements a finalizer that does not specify family (protected) access.

Note

This rule has been deprecated. For more information, see Deprecated rules.

Rule description

Finalizers must use the family access modifier. This rule is enforced by the C#, Visual Basic, and C++ compilers.

How to fix violations

To fix a violation of this rule, change the finalizer to be family-accessible.

When to suppress warnings

Do not suppress a warning from this rule.

Example

This rule cannot be violated in any high-level .NET language; it can be violated if you are writing Microsoft Intermediate Language.

// =============== CLASS MEMBERS DECLARATION ===================
//   note that class flags, 'extends' and 'implements' clauses
//          are provided here for information only

.namespace UsageLibrary
{
  .class public auto ansi beforefieldinit FinalizeMethodNotProtected
         extends [mscorlib]System.Object
  {
    .method public hidebysig instance void
            Finalize() cil managed
    {

      // Code size       1 (0x1)
      .maxstack  0
      IL_0000:  ret
    } // end of method FinalizeMethodNotProtected::Finalize

    .method public hidebysig specialname rtspecialname
            instance void  .ctor() cil managed
    {
      // Code size       7 (0x7)
      .maxstack  1
      IL_0000:  ldarg.0
      IL_0001:  call       instance void [mscorlib]System.Object::.ctor()
      IL_0006:  ret
    } // end of method FinalizeMethodNotProtected::.ctor

  } // end of class FinalizeMethodNotProtected
} // end of namespace

See also