WCF Xml Serialization

Question

Dears

I'm working with asp .net (C#) , I need to create a web service, which will be having purchase request. 

 

How to create serializable classes with master detail relationship.

 

The input parameters will be like this,

 

   PurchaseRequest (Single Record)   -->   PurchaseItems (Multiple Records) -->   Itemspecification(single Record) 

 

Below is my xml 

 

<purchase>

<purchaserequest>

<reqid>req 1</reqid>

<reqddate>10/10/2005</reqddate>

<Items>

<itemcode>item 1</itemcode>

<itemname>item name 1</itemname>

<specification>

<size>Medium</size>

<color>blue</color>

<qty>10</qty>

</specification>

</Items>

<Items>

<itemcode>item 1</itemcode>

<itemname>item name 1</itemname>

<specification>

<size>Small</size>

<color>blue</color>

<qty>5</qty>

</specification>

</Items>

<Items>

<itemcode>item 2</itemcode>

<itemname>item name 2</itemname>

<specification>

<size>Small</size>

<color>blue</color>

<qty>10</qty>

</specification>

</Items>

</purchaserequest>

</purchase>

 Thanks & Regards

Suhesh