How to create web API in dotnet

See more:

ASP.NET

MVC

C#3.5

WebAPI

I want to create a web api and want response like

<school>
< Student>1
<teacher>1
<ofcboy>1
< Book>1


How i will create web api where student and Teacher will be pass from parameter.

What I have tried:

[HttpGet]

public HttpResponseMessage GetData(string user, string pass)
{
    Account account = new Account();
    account.username = user;
    account.password = pass;
    account.host = "1.2.3.4";
    account.codecOrder = "9,0,8,102,3";
    account.codecOrder3G = "102,3,9,0,8";

    // return account;
    var content = new ObjectContent<Account>(account,
                    (Configuration.Formatters.XmlFormatter));

    return new HttpResponseMessage()
    {
        Content = content
    };


}

I have created like this but getting namespace of XML