The best-practice way to use a plausibility check

namespace CleanLib.Lego.Parts;

public class Color : Entity {
    private string? _Name;
    public string Name {
        get => this._Name!;
        set {
            value.ThrowIfNullOrWhiteSpace();

            this._Name = value;
        }
    }

    private string? _Code;
    public string Code {
        get => this._Code!;
        set {
            value.ThrowIfNullOrWhiteSpace();

            this._Code = value;
        }
    }

    public Color(string name, string code) {
        this.Name = name;
        this.Code = code;
    }
}