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Specifies that a property or procedure cannot be overridden in a derived class.
Remarks
NotOverridable is the default setting for a property or procedure that does not itself override a base class property or procedure.
An element that cannot be overridden is sometimes called a sealed element.
Rules
Declaration Context. You can use NotOverridable only in a property or procedure declaration statement. You can specify NotOverridable only on a property or procedure that overrides another property or procedure, that is, only in combination with Overrides.
Combined Modifiers. You cannot specify NotOverridable together with MustOverride, Overridable, or Shared in the same declaration.
The NotOverridable modifier can be used in these contexts:
Function Statement (Visual Basic)