概要

System.HashCode を使用すると GetHashCode を簡単に実装できる

using System;
using UnityEngine;

public sealed class Character
{
    public int    Id   { get; }
    public string Name { get; }

    public Character
    (
        int    id,
        string name
    )
    {
        Id   = id;
        Name = name;
    }

    public override int GetHashCode()
    {
        return HashCode.Combine( Id, Name );

        // var hashCode = new HashCode();
        // hashCode.Add( Id );
        // hashCode.Add( Name );
        // return hashCode.ToHashCode();
    }
}

public sealed class Example : MonoBehaviour
{
    private void Start()
    {
        var character = new Character( 25, "ピカチュウ" );
        Debug.Log( character.GetHashCode() );
    }
}