Reading XML from API in C#

I am trying to read from an API which returns me XML. I would like to pull this xml and save it into sql server.

I am trying to do this in C#. I have tried many times but no luck. Couldnt find a way. Could you please advise or guide me about where i should start?

My question is: how can i send request (let say every hour) to this api and pull xml and save the result into my database in C#?

This is api address:

http://ift.tt/1zkaWsm

This is XML POST Request:

<TransactionSearchRequest xmlns="http://ift.tt/1zkaUAH">
<ID>1234567891</ID>
<Date>03.12.2014</Date>
</TransactionSearchRequest>

This is XML response:

<TransactionSearchResponse
xmlns:i="http://ift.tt/ra1lAU"   xmlns="http://ift.tt/1zkaUAH">
<Transactions>
    <Transaction>
        <AcctNo i:nil="true" />
        <Amount>99</Amount>
        <ID>1234567891</ID>
        <Description>TEST</Description>
        <ResultMessage i:nil="true" />
    </Transaction>
</Transactions>
<SearchResultCode>1</SearchResultCode>
<SearchResultMessage>Search succesfull</SearchResultMessage>