Equals and GetHashCode

Custom implementation is usually only necessary if default, reference equality is not enough. In example:

• entities value based equality
• value equality of deserialized objects
• custom comparisons based on other criterias

public class ImaginaryNumber : IEquatable<ImaginaryNumber> { public double RealNumber { get; set; } public double ImaginaryUnit { get; set; } public override bool Equals(object obj) { return Equals(obj as ImaginaryNumber); } public bool Equals(ImaginaryNumber other) { return other != null && RealNumber == other.RealNumber && ImaginaryUnit == other.ImaginaryUnit; } public override int GetHashCode() { return HashCode.Combine(RealNumber, ImaginaryUnit); } }