public interface IMetaDataAssemblyImport {

    //    IUnknown *ppIUnk[],         // [OUT] put IMetaDataAssemblyImport pointers here

    /// <param name="ppIUnk">[in] An array of type <c>IUnknown</c> in which to put the <c>IIMetadataAssemblyImport</c> interface pointers. </param>

        Guid metaDataAssemblyImportRiid = new Guid((typeof(IMetaDataAssemblyImport).GetCustomAttributes(typeof(GuidAttribute), false).Single() as GuidAttribute).Value);

        IMetaDataAssemblyImport metaDataAssemblyImport = metaDataAssemblyImportObj as IMetaDataAssemblyImport;

    /// The value of riid must specify one of the "import" or "emit" interfaces. Valid values are IID_IMetaDataEmit, IID_IMetaDataImport, IID_IMetaDataAssemblyEmit, IID_IMetaDataAssemblyImport, IID_IMetaDataEmit2, or IID_IMetaDataImport2.

    /// The value of riid must specify one of the "import" or "emit" interfaces. Valid values are IID_IMetaDataEmit, IID_IMetaDataImport, IID_IMetaDataAssemblyEmit, IID_IMetaDataAssemblyImport, IID_IMetaDataEmit2, or IID_IMetaDataImport2.