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Type.IsAutoLayout Property

Gets a value indicating whether the fields of the current type are laid out automatically by the common language runtime.

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

'Declaration
Public ReadOnly Property IsAutoLayout As Boolean

Property Value

Type: System.Boolean
true if the Attributes property of the current type includes TypeAttributes.AutoLayout; otherwise, false.

Implements

_Type.IsAutoLayout

This property is provided as a convenience. Alternatively, you can use the TypeAttributes.LayoutMask enumeration value to select the type layout attributes, and then test whether TypeAttributes.AutoLayout is set. The TypeAttributes.AutoLayout, TypeAttributes.ExplicitLayout, and TypeAttributes.SequentialLayout enumeration values indicate the way the fields of the type are laid out in memory.

For dynamic types, you can specify TypeAttributes.AutoLayout when you create the type. In code, apply the StructLayoutAttribute attribute with the LayoutKind.Auto enumeration value to the type, to let the runtime determine the appropriate way to lay out the class.

NoteNote

You cannot use the GetCustomAttributes method to determine whether the StructLayoutAttribute has been applied to a type.

If the current Type represents a constructed generic type, this property applies to the generic type definition from which the type was constructed. For example, if the current Type represents MyGenericType<int> (MyGenericType(Of Integer) in Visual Basic), the value of this property is determined by MyGenericType<T>.

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 creates an instance of the type and displays the IsAutoLayout property.

Imports System
Imports System.Runtime.InteropServices
Imports Microsoft.VisualBasic

' The Demo class is has the AutoLayout attribute.
<StructLayoutAttribute(LayoutKind.Auto)> _
Public Class Demo
End Class  

Public Class Example
    Public Shared Sub Main()
        ' Get the Type object for the Demo class. 
        Dim myType As Type = GetType(Demo)
        ' Get and display the IsAutoLayout property of the  
        ' Demo class.
        Console.WriteLine("The AutoLayout property for the Demo class is '{0}'.", _
            myType.IsAutoLayout.ToString())
    End Sub  
End Class

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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