C#利用反射来判断对象是否包含某个属性的实现方法

/// <summary>
/// 利用反射来判断对象是否包含某个属性
/// </summary>
/// <param name="instance">object</param>
/// <param name="propertyname">需要判断的属性</param>
/// <returns>是否包含</returns>
public static bool containproperty(this object instance, string propertyname)
{
  if (instance != null && !string.isnullorempty(propertyname))
  {
 propertyinfo _findedpropertyinfo = instance.gettype().getproperty(propertyname);
 return (_findedpropertyinfo != null);
  }
  return false;
}

bool cc = _person.containproperty("cc");
bool aa = _person.containproperty("age");