public static PropertyDescriptorCollection GetProperties(object component, Attribute[] attributes, bool noCustomTypeDesc) {
if (component == null) {
return new PropertyDescriptorCollection(null, true);
}
if (System.Runtime.InteropServices.Marshal.IsComObject(component)) {
// Do not rip this varible -- it is here to make the get to
// this static variable thread-safe.
//
#pragma warning disable 618
IComNativeDescriptorHandler handler = comNativeDescriptorHandler;
#pragma warning restore 618
if (handler != null) {
return handler.GetProperties(component, attributes);
}
return new PropertyDescriptorCollection(null, true);
}
if (!noCustomTypeDesc && component is ICustomTypeDescriptor) {
PropertyDescriptorCollection properties = ((ICustomTypeDescriptor)component).GetProperties(attributes);
return GetEntry(component, component.GetType()).FilterProperties(component, attributes, properties);
}
return GetEntry(component, component.GetType()).GetProperties(component, attributes,(component is ICustomTypeDescriptor));
}