/// <summary>
/// 获取原点特征
/// </summary>
/// <param name="comp"><see cref="IComponent2"/> Interface</param>
/// <returns></returns>
public static IFeature GetOrignFeat(this IComponent2 comp)
{
return(comp.GetCompTopFeatures().Where(f => f.GetTypeName2() == FeatureTypeName.OrignSys).FirstOrDefault());
}