Easy HashCode and Equals override

Proposition

An easy way to implement default HashCode and Equals method, similar to that implemented by anonymous types

Situation

If the HashCode and Equals are already implemented by the language in some situation, why I should reimplement it? I got myself, doing this more than one time:

    public class SomeThing
    {
        public decimal Tax { get; set; }
        public decimal Comission { get; set; }

        // Etc...

        public override int GetHashCode()
        {
            return new
            {
                Tax,
                Comission,
            }.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            var other = obj as SomeThing;

            if (other == null)
                return false;

            return new { Tax, Comission }.Equals(new { other.Tax, other.Comission });
        }
    }

Why not something like this:

    [DefaultHashCode]
    [DefaultEquals]
    public class SomeThing
    {
        public decimal Tax { get; set; }
        public decimal Comission { get; set; }

        // Etc...
    }

Or maybe:

    public class SomeThing
    {
        public decimal Tax { get; set; }
        public decimal Comission { get; set; }

        // Etc...

        public override object GetStrucuralProperties()
        {
            return new { Tax, Comission };
        }
    }

[CyrusNajmabadi]

I wonder what are those more important things.

The current set of 8.0 features for example 😃

I believe these cases better show the importance of the community feedback

There has been minimal community feedback that this is an issue that warrants a lot of attention from MS. This issue alone only has a 10 posts from a handful of people.

[gafter]

We prefer to avoid giving language semantics to attributes.

The proposed C# records are exact analogs to Scala’s case classes, and would appear to address the underlying use cases.