How I write Equals and GetHashCode in csharp
My code is copied with pride from the net.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | /// This is standard overridden Equals method. /// Code is copied with pride from /// http://msdn.microsoft.com/en-us/library/336aedhh(v=vs.85).aspx /// ////// public override bool Equals(object obj) { if (null == obj || GetType() != obj.GetType()) { return false; } var b = (MyType)obj; return this.Property1 == b.Property1 && ... this.PropertyN == b.PropertyN; } /// This is the ordinary overriden GetHashCode /// with code proudly copied from /// http://stackoverflow.com/questions/263400/what-is-the-best-algorithm-for-an-overridden-system-object-gethashcode /// /// public override int GetHashCode() { unchecked // Overflow is fine, just wrap { const int Salt = 23; var hash = 17; hash = hash + Salt * Property1.GetHashCode(); ... hash = hash + Salt * (null == PropertyN ? 0 : PropertyN.GetHashCode()); // Nullable values has to be taken care of. return hash; } } |