shp转featureclass

public void ConvertShapefileToFeatureClass()
{
    // Create a name object for the source (shapefile) workspace and open it.
    IWorkspaceName sourceWorkspaceName = new WorkspaceNameClass
    {
        WorkspaceFactoryProgID = "esriDataSourcesFile.ShapefileWorkspaceFactory",
            PathName = @"C:\Data\Shapefiles"
    };
    IName sourceWorkspaceIName = (IName)sourceWorkspaceName;
    IWorkspace sourceWorkspace = (IWorkspace)sourceWorkspaceIName.Open();

    // Create a name object for the target (file GDB) workspace and open it.
    IWorkspaceName targetWorkspaceName = new WorkspaceNameClass
    {
        WorkspaceFactoryProgID = "esriDataSourcesGDB.FileGDBWorkspaceFactory",
            PathName = @"C:\Data\Public.gdb"
    };
    IName targetWorkspaceIName = (IName)targetWorkspaceName;
    IWorkspace targetWorkspace = (IWorkspace)targetWorkspaceIName.Open();

    //