RequiredMemberAttribute

Когда тип помечен, все его члены с [RequiredMember] помечены.

using System;
using UnityEngine;
using UnityEngine.Scripting;

public class NewBehaviourScript : MonoBehaviour
{
    void Start()
    {
        new PlayerProfile();
    }
}

class PlayerProfile
{
    // Will survive managed code stripping because PlayerProfile is used
    [RequiredMember]
    public int level;

    // Will survive managed code stripping because PlayerProfile is used
    [RequiredMember]
    public void ResetProgress()
    {
    }

    // The property, property getter method, and property setter method will survive managed code stripping because PlayerProfile is used
    [RequiredMember]
    public int Score { get; set; }

    // The property and property getter method will survive managed code stripping because PlayerProfile is used
    public int HighScore { [RequiredMember] get; set; }

    // The property and property setter method will survive managed code stripping because PlayerProfile is used
    public int Coins { get; [RequiredMember] set; }

    // The event, the add method, and the remove method will survive managed code stripping because PlayerProfile is used
    [RequiredMember]
    public event EventHandler ProgressChanged;

    // Might not survive managed code stripping: without [RequiredMember], this member
    // is kept only if the linker detects that it's used. Mark it to guarantee it survives,
    // for example when it's only accessed through reflection or serialization.
    public int sessionCount;
}

class LegacyPlayerProfile
{
    // Will not survive stripping because LegacyPlayerProfile is not used
    [RequiredMember]
    public int level;

    // Will not survive stripping because LegacyPlayerProfile is not used
    [RequiredMember]
    public void ResetProgress()
    {
    }

    // Will not survive stripping because LegacyPlayerProfile is not used
    [RequiredMember]
    public int Score { get; set; }

    // Will not survive stripping because LegacyPlayerProfile is not used
    [RequiredMember]
    public event EventHandler ProgressChanged;

    // Will not survive stripping either. This member has no [RequiredMember], but that
    // makes no difference: once LegacyPlayerProfile itself is stripped, all of its members go with it.
    public int sessionCount;
}