Freezable.ReadPreamble Method (System.Windows)

.NET Framework Class Library

Freezable..::.ReadPreamble Method

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

Protected Sub ReadPreamble

protected void ReadPreamble()

protected:
void ReadPreamble()

member ReadPreamble : unit -> unit

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, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, 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.

Reference

Freezable Class

System.Windows Namespace

WritePreamble

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