动态修改类成员属性的特性

void   SetPropertyVisibility(object   obj,   string   propertyName,   bool   visible)   
  {   
  Type   type   =   typeof(BrowsableAttribute);   
  PropertyDescriptorCollection   props   =   TypeDescriptor.GetProperties(obj);   
  AttributeCollection   attrs   =   props[propertyName].Attributes;   
  FieldInfo   fld   =   type.GetField("browsable",   BindingFlags.Instance   |   BindingFlags.NonPublic);   
  fld.SetValue(attrs[type],   visible);   
  }