Serialization from object to XML is not bringing non-string data type values

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C#

serialization

XmlSerializer

someclass objsomeclass = new someclass ();
objsomeclass.portalServiceInput = new portalServiceInput();
objsomeclass.portalServiceInput.bank_Account_Number = "12563";
objsomeclass.portalServiceInput.bank_Finance_Details = "145263";
objsomeclass.portalServiceInput.bank_Finance_Reqd = "1526";
objsomeclass.portalServiceInput.bc_Code = "1253";
objsomeclass.portalServiceInput.bc_Employee_Code = "12563";
objsomeclass.portalServiceInput.branchId = "500100";
objsomeclass.portalServiceInput.customerId = "9520943481";
objsomeclass.portalServiceInput.customerName = "Sarathy";
objsomeclass.portalServiceInput.customerType = "INDIVIDUAL";
objsomeclass.portalServiceInput.from = "UBI";
objsomeclass.portalServiceInput.policySOABO = new policySOABO();
objsomeclass.portalServiceInput.policySOABO.agreementCode = "500100046621900000053301";
objsomeclass.portalServiceInput.policySOABO.effectDate = Convert.ToDateTime("2015-04-16T16:58:44+05:30");
objsomeclass.portalServiceInput.policySOABO.expiryDate = Convert.ToDateTime("2016-04-15T23:59:00+05:30");
objsomeclass.portalServiceInput.policySOABO.productCode = "NMCATTLE";
objsomeclass.portalServiceInput.policySOABO.productId = Convert.ToInt64(700015020);//INT64

XmlSerializer x = new XmlSerializer(objsomeclass.GetType());
using (TextWriter writer = new StreamWriter(@"C:\Xml.xml"))
{
  x.Serialize(writer, objsomeclass);
}

I have a wsdl which I'm consuming in my windows application. So I have a someclass class in it. Using it I'm passing values to form the object of that class which I've to send back.
After the object is formed when I'm trying to serialize this object to XML using XMLSerializer. I'm not getting the non-string values.
Where the issue might be??