dynamic field equals

equals.cs

void Main()
{
	Model one = new() { Prop1 = null };
	Model two = new() { Prop1 = null };
	one.GetHashCode().Equals(two.GetHashCode()).Dump("hashcode");	
	one.Equals(two).Dump("equals");
}

public class Model
{
	public string Prop1 { get; set; } = default;
	public int Prop2 { get; set; } = default;
	public bool Prop3 { get; set; } = default;
	public float? Prop4 { get; set; } = default;
	public int DefaultZero { get; set; }

	private PropertyInfo[]? _properties;
	private PropertyInfo[] Properties => (_properties ?? (_properties = this.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public)));

	public override int GetHashCode()
	{
		return Properties
				.OrderBy(p => p.Name)
				.Select(p => p.GetValue(this))
				.Where(value => value is not null)
				.Select(value => value!.GetHashCode())
				.Aggregate((total, next) => total ^ next);
	}

	public override bool Equals(object? obj)
	{
		foreach (var propertyInfo in Properties)
		{
			var thisValue = propertyInfo.GetValue(this);
			var otherValue = propertyInfo.GetValue(obj);
			var equal = object.Equals(thisValue, otherValue);

			if (!equal) return false;
		}

		return true;
	}
}

public class Model2 
{

	public string Prop1 { get; set; } = default;
	public int Prop2 { get; set; } = default;
	public bool Prop3 { get; set; } = default;
	public float? Prop4 { get; set; } = default;

	public override int GetHashCode()
	{		
		return Properties
				.OrderBy(p => p.Name)
				.Select(p => p.GetValue(this))
				.Where(value => value is not null)
				.Select(value => value!.GetHashCode())
				.Aggregate((total, next) => total ^ next);
	}

	private PropertyInfo[]? _properties;
	private PropertyInfo[] Properties => (_properties ?? (_properties = this.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public)));

}