问如何在运行时更改属性网格网格项行为？

EN

//Represents each property to show in the control, required since 
//PropertyDescriptor is declared abstract
public class MyPropertyDescriptor : PropertyDescriptor
{
  public MyPropertyDescriptor(string name, Attribute[] attrs) : base(name, attrs)
  {
  }
}

//This is the class that is bound to the PropertyGrid. Using 
//CustomTypeDescriptor instead of ICustomTypeDescriptor saves you from 
//having to implement all the methods in the interface which are stubbed out
//or default to the implementation in TypeDescriptor
public class MyClass : CustomTypeDescriptor
{
   //This is the property that controls what other properties will be 
   //shown in the PropertyGrid,  by attaching the RefreshProperties 
   //attribute, this will tell  the PropertyGrid to query the bound 
   //object for the list of properties to show by calling your implementation
   //of GetProperties 
   [RefreshProperties(RefreshProperties.All)]
   public int ControllingProperty { get; set; }

   //Dependent properties that can be dynamically added/removed
   public int SomeProp { get; set; }
   public int SomeOtherProp { get; set; }

   //Return the list of properties to show 
   public PropertyDescriptorCollection GetProperties(Attribute[] attributes)
   {
      List<MyPropertyDescriptor> props = new List<MyPropertyDescriptor>();

      //Insert logic here to determine what properties need adding to props
      //based on the current property values

      return PropertyDescriptorCollection(props.ToArray());
   }
}