System.Runtime.Serialization.Plists.Extensions.IsDefaultValue C# (CSharp) Method

        public static bool IsDefaultValue(this Type type, object value)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type", "type cannot be null.");
            }

            TypeCode typeCode = Type.GetTypeCode(type);

            if (typeCode != TypeCode.Empty && typeCode != TypeCode.Object && value == null)
            {
                throw new ArgumentException("Cannot pass a null value when the specified type is non-nullable.", "value");
            }

            if (!type.IsAssignableFrom(value.GetType()))
            {
                throw new ArgumentException("The specified object value is not assignable to the specified type.", "value");
            }

            switch (Type.GetTypeCode(type))
            {
                case TypeCode.Boolean:
                    return (bool)value == false;
                case TypeCode.Byte:
                case TypeCode.Char:
                case TypeCode.Int16:
                case TypeCode.Int32:
                case TypeCode.Int64:
                case TypeCode.SByte:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64:
                    return (long)value == 0;
                case TypeCode.DateTime:
                    return (DateTime)value == DateTime.MinValue;
                case TypeCode.DBNull:
                    return true;
                case TypeCode.Decimal:
                case TypeCode.Double:
                case TypeCode.Single:
                    return (double)value == 0;
                default:
                    return value == null;
            }
        }