Access to the temp directory is denied. Identity '{0}' under which XmlSerializer is running does not have sufficient permission ...

Access to the temp directory is denied.  Identity '{0}' under which XmlSerializer is running does not have sufficient permission to access the temp directory.  CodeDom will use the user account the process is using to do the compilation, so if the user doesn�t have access to system temp directory, you will not be able to compile.  Use Path.GetTempPath() API to find out the temp directory location.