System.Xml.Serialization.MemberMapping.GetNullableType C# (CSharp) Method

        private string GetNullableType(TypeDesc td)
        {
            // SOAP encoded arrays not mapped to Nullable<T> since they always derive from soapenc:Array
            if (td.IsMappedType || (!td.IsValueType && (Elements[0].IsSoap || td.ArrayElementTypeDesc == null)))
                return td.FullName;
            if (td.ArrayElementTypeDesc != null)
            {
                return GetNullableType(td.ArrayElementTypeDesc) + "[]";
            }
            return "System.Nullable`1[" + td.FullName + "]";
        }