Type.IsSealed Property


Gets a value indicating whether the Type is declared sealed.

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

Public ReadOnly Property IsSealed As Boolean

Property Value

Type: System.Boolean

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



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.

Public Class Example
    ' Declare InnerClass as sealed.
    Public NotInheritable Class InnerClass
    End Class

    Public Shared Sub Main()
         Dim inner As New InnerClass()
         ' Get the type of InnerClass.
         Dim innerType As Type = inner.GetType()
         ' Get the IsSealed property of InnerClass.
         Dim sealed As Boolean = innerType.IsSealed
         Console.WriteLine("{0} is sealed: {1}.", innerType.FullName, sealed)
    End Sub
End Class
' The example displays the following output:
'       Example+InnerClass is sealed: True.

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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