using Microsoft.Tools.WindowsInstallerXml; namespace WixFileVersionExtension { public class WixFileVersionExtension : WixExtension { private WixFileVersionPreprocessorExtension _versionPreprocessorExtension; public override PreprocessorExtension PreprocessorExtension { get { // If we haven't created the preprocessor then do it now if (_versionPreprocessorExtension == null) _versionPreprocessorExtension = new WixFileVersionPreprocessorExtension(); // Return the preprocessor return _versionPreprocessorExtension; } } } }