How to get all Items the player has unlocked and purchased

[ObiVanDamme]

Hello everyone,

in my mod I try to load a list of all parts that are already unlocked and purchased by the player. The list should contain the same items as the menu in the VAB. I currently have the following code to do so.

var items = new List<AvailablePart>();
foreach (var loadedPart in PartLoader.LoadedPartsList)
{
    if (ResearchAndDevelopment.PartModelPurchased(loadedPart))
    {
        items.Add(loadedPart);
    }
}

This code seems to work in science mode, but not in career mode. Is there another thing to check besides the PartModelPurchased?

Thank you.