give c# code for foreach

Question

<?xml version="1.0" encoding="utf-8"?>

<Users>

<User>

<UserName>Aaisha</UserName>

<UserPassword>QWRtaW4xMjM0</UserPassword>

<Account>savings</Account>

<City>chennai</City>

</User>

<User>

<UserName>support</UserName>

<UserPassword>U3RvcmUwOTg3</UserPassword>

<Account>savings</Account>

<City>Madurai</City>

</User>

<User>

<UserName>amazon service</UserName>

<UserPassword>Rm9vZDEyMzQ=</UserPassword>

<Account>savings</Account>

<City>Pandy</City>

</User>

<User>

<UserName>mahi</UserName>

<UserPassword>MTIzNFVtZXNo</UserPassword>

<Account>savings</Account>

<City>Madurai</City>

</User>

<User>

<UserName>Ramesh</UserName>

<UserPassword>MTIzNFVtZXNo</UserPassword>

<Account>savings</Account>

<City>Coiambattur</City>

</User>

<User>

<UserName>Rajesh</UserName>

<UserPassword>MTIzNFVtZXNo</UserPassword>

<Account>savings</Account>

<City>Coiambattur</City>

</User>

<User>

<UserName>Ragav</UserName>

<UserPassword>MTIzNFVtZXNo</UserPassword>

<Account>current</Account>

<City>Pandy</City>

</User>

<User>

<UserName>Rani</UserName>

<UserPassword>MTIzNFVtZXNo</UserPassword>

<Account>current</Account>

<City>Pandy</City>

</User>

<UserName>Avi</UserName>

<UserPassword>QWRtaW4xMjM0</UserPassword>

<Account>savings</Account>

<City>chennai</City>

</Users>

 

 read from xml file add only city to to commbobox .then if i select city in dropdownlist it will show the users in datagrid please tell me