Type.IsAbstract Property
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets a value indicating whether the Type is abstract and must be overridden.
Assembly: mscorlib (in mscorlib.dll)
If the current Type represents a type parameter in the definition of a generic type or generic method, this property always returns false.
The following example returns true if the specified object is abstract; otherwise, it returns false.
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To run this example, see Building examples that have static TextBlock controls for Windows Phone 8. |
Imports System.Reflection Public MustInherit Class MyMustInheritClass End Class 'MyMustInheritClass Public Class [MyClass] End Class '[MyClass] Public Class Example Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock) Try ' Check whether the return type of MyMustInheritClass is MustInherit or not. outputBlock.Text &= ControlChars.NewLine + "Checking whether the type is MustInherit." + ControlChars.NewLine & vbCrLf If GetType([MyMustInheritClass]).IsAbstract = True Then outputBlock.Text += String.Format("MyMustInheritClass is {0}", "a MustInherit class.") & vbCrLf Else outputBlock.Text += String.Format("MyMustInheritClass is {0}", "not a MustInherit class.") & vbCrLf End If ' Check whether the return type of MyClass is MustInherit or not. If GetType([MyClass]).IsAbstract = True Then outputBlock.Text += String.Format("MyClass is {0}", "a MustInherit class.") & vbCrLf Else outputBlock.Text += String.Format("MyClass is {0}", "not a MustInherit class.") & vbCrLf End If Catch e As Exception outputBlock.Text += String.Format("Exception: {0} " + ControlChars.Cr, e.Message.ToString()) & vbCrLf End Try End Sub 'Main End Class 'Type_IsMustInherit
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