public override List <Type> GetSourceCollection(ITypeDescriptorContext context)
{
ITypeInfo reportParametersObjectBaseTypeInfo = XafTypesInfo.Instance.FindTypeInfo(typeof(ReportParametersObjectBase));
Guard.ArgumentNotNull(reportParametersObjectBaseTypeInfo, "reportParametersObjectBaseTypeInfo");
return(new List <Type>(Enumerator.Convert <ITypeInfo, Type>(reportParametersObjectBaseTypeInfo.Descendants, XafTypesInfo.CastTypeInfoToType)));
}