When overridden in a derived class, forces the generation of a character entity for the specified Unicode character value.
Assembly: System.Xml (in System.Xml.dll)
The character is in the surrogate pair character range, 0xd800 - 0xdfff.
An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.”
This method writes the Unicode character in hexadecimal character entity reference format.
For the asynchronous version of this method, see WriteCharEntityAsync.
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.