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Freezable.ReadPreamble Method

.NET Framework 4.5

Ensures that the Freezable is being accessed from a valid thread. Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties.

Namespace: System.Windows
Assembly: WindowsBase (in WindowsBase.dll)

Syntax

C++

protected void ReadPreamble()

Remarks

Notes to Inheritors

Classes that derive from Freezable should call the ReadPreamble method before they attempt to access any members that are not dependency properties. The WritePreamble method should be called before any such members are written to.

This method effectively does nothing more than call VerifyAccess.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

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.

Reference

Freezable Class

System.Windows Namespace

WritePreamble

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