OpenDialog get path

public string GetPath()
        {
            string path="";
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "txt文件(*.txt)|*.txt|shp文件(*.shp)|*.shp";
            openFileDialog.FilterIndex = 1;
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                path = openFileDialog.FileName;
            }
            return path;
        }