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Type.IsSealed Property

Gets a value indicating whether the Type is declared sealed.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public ReadOnly Property IsSealed As Boolean

Property Value

Type: System.Boolean
true if the Type is declared sealed; otherwise, false.

Implements

_Type.IsSealed

If the current Type represents a type parameter of a generic type, this property always returns true.

The following example creates an instance of a sealed class, checks for the IsSealed property, and displays the result.


Imports System
Imports Microsoft.VisualBasic
Namespace SystemType
    Public Class [MyClass]
        ' Declare MyTestClass as sealed.
        Public NotInheritable Class MyTestClass
        End Class 'MyTestClass
        Public Shared Sub Main()
            Try
                Dim myBool As Boolean = False
                Dim myTestClassInstance As New MyTestClass()
                ' Get the type of myTestClassInstance.
                Dim myType As Type = myTestClassInstance.GetType()
                ' Get the IsSealed property of myTestClassInstance.
                myBool = myType.IsSealed
                Console.WriteLine(ControlChars.Cr + "Is {0} sealed? {1}.", myType.FullName, myBool.ToString())
            Catch e As Exception
                Console.WriteLine(ControlChars.Cr + "An exception occurred: {0}", e.Message.ToString())
            End Try
        End Sub 'Main
    End Class '[MyClass] 
End Namespace 'SystemType


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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