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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

Finalizers should be protected

TypeName

FinalizersShouldBeProtected

CheckId

CA2221

Category

Microsoft.Usage

Breaking Change

Non Breaking

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

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

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

Do not suppress a warning from this rule.

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

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