System.Xml.Serialization.CaseInsensitiveKeyComparer.IEqualityComparer C# (CSharp) Метод

        int IEqualityComparer.GetHashCode(Object obj)
        {
            string s = obj as string;
            if (s == null)
                throw new ArgumentException(null, nameof(obj));

            return CultureInfo.CurrentCulture.TextInfo.ToUpper(s).GetHashCode();
        }
    }