ArcGIS COM Exception 0x80040228

问题：

 string shpDir = Path.GetDirectoryName(shpfile);

            string shpfilename = Path.GetFileName(shpfile);

            IWorkspaceFactory wsFactory = new ShapefileWorkspaceFactoryClass();

            IWorkspace ws = wsFactory.OpenFromFile(shpDir, 0);

            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)ws;

            IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(shpfilename);

出现异常：

 COM Exception 0x80040228

解决方法：

[STAThread]static void Main()
{
IAoInitialize aoInit = new AoInitializeClass();          
aoInit.Initialize(esriLicenseProductCode.esriLicenseProductCodeEngine);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new formMain());    
aoInit.Shutdown();
}

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