/// <summary>
/// 添加图形字段
/// </summary>
/// <param name="fields"></param>
/// <param name="geoType"></param>
/// <param name="name"></param>
public static void AddShapeField(this IFields fields, esriGeometryType geoType, string name = "SHAPE")
{
fields.AddShapeField(geoType, XSpatialReference.Unknown, name);
}