/// <summary>
/// Finds all featureclasses from the dataset of the given name with the given geometry type.
/// </summary>
/// <param name="workspace"></param>
/// <param name="featureDatasetName"></param>
/// <param name="geoType"></param>
/// <returns></returns>
public static IEnumerable <IFeatureClass> OpenFeatureClasses(this IWorkspace workspace, string featureDatasetName, params esriGeometryType[] geoType)
{
IFeatureDataset featureDataset = workspace.OpenFeatureDataset(featureDatasetName);
IEnumerable <IFeatureClass> classes = featureDataset.OpenFeatureClasses(geoType);
Marshal.FinalReleaseComObject(featureDataset);
return(classes);
}