Clean way for updating object in a collection of abstract objects - asp.net

Question

As I'm developping an asp net core + ef core 2.0 with localized objects in my model, I adapted the solution provided in the following link to localize my objects link.
I'm now trying to find a clean way to update my collection of translation when updated object are received in the controller.
For the moment I have a step model class defined this way :
public class Step
{
//Native properties
public Guid ID { get; set; }
public string Name { get; set; }
public int Order { get; set; }
public string ScriptBlock { get; set; }
//Parent Step Navigation property
public Nullable<Guid> ParentStepID { get; set; }
public virtual Step ParentStep { get; set; }
//Collection of sub steps
public virtual ICollection<Step> SubSteps { get; set; }
//MUI Properties
public TranslationCollection<StepTranslation> Translations { get; set; }
public string Description { get; set; }
//{
// get { return Translations[CultureInfo.CurrentCulture].Description; }
// set { Translations[CultureInfo.CurrentCulture].Description = value; }
//}
public Step()
{
//ID = Guid.NewGuid();
Translations = new TranslationCollection<StepTranslation>();
}
}
public class StepTranslation : Translation<StepTranslation>
{
public Guid StepTranslationId { get; set; }
public string Description { get; set; }
public StepTranslation()
{
StepTranslationId = Guid.NewGuid();
}
}
Translation and translationCollection are the same as in the link
public class TranslationCollection<T> : Collection<T> where T : Translation<T>, new()
{
public T this[CultureInfo culture]
{
// indexer
}
public T this[string culture]
{
//indexer
}
public bool HasCulture(string culture)
{
return this.Any(x => x.CultureName == culture);
}
public bool HasCulture(CultureInfo culture)
{
return this.Any(x => x.CultureName == culture.Name);
}
}
public abstract class Translation<T> where T : Translation<T>, new()
{
public Guid Id { get; set; }
public string CultureName { get; set; }
protected Translation()
{
Id = Guid.NewGuid();
}
public bool HasProperty(string name)
{
return this.GetType()
.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Any(p => p.Name == name);
}
}
My issue in this sample is how to deal correctly with the PUT method and the Description property of my step controller. When it receive a Step object to update (which is done through a native c# client) only the string Description property of Step might have been created/updated/unchanged. So I have to update/create/do Nothing on the Description of the translation in the correct culture.
My first guess is to add in the TranslationCollection class a method in which I could pass the culture, the name of the property to update or not (Description in this case) and the value of the Description.
But as the TranslationCollection is a collection of abstract objects I don't even if this is a good idea and if it's possible.
If someone would have any advice on it (hoping I was clear enough) it would be great !

Answer 1

Finally answered my own question, and it was quite simple.
Just had to use the indexer like :
myobject.Translations[userLang].Name = value;