CA2220: Finalizers should call base class finalizer
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|Breaking Change||Non Breaking|
A type that overrides System.Object.Finalize does not call the Finalize method in its base class.
Finalization must be propagated through the inheritance hierarchy. To ensure this, types must call their base class Finalize method from within their own Finalize method. The C# compiler adds the call to the base class finalizer automatically.
How to Fix Violations
To fix a violation of this rule, call the base type's Finalize method from your Finalize method.
When to Suppress Warnings
Do not suppress a warning from this rule. Some compilers that target the common language runtime insert a call to the base type's finalizer into the Microsoft intermediate language (MSIL). If a warning from this rule is reported, your compiler does not insert the call, and you must add it to your code.
The following Visual Basic example shows a type
TypeB that correctly calls the Finalize method in its base class.
Imports System Namespace UsageLibrary Public Class TypeB Inherits TypeA Protected Overrides Sub Finalize() Try Dispose(False) Finally MyBase.Finalize() End Try End Sub End Class End Namespace