//Use the GetAccountTypes method to get all AccountTypes in the BFS instance and write
//the information in the console
var client = new BFSServiceReference.bfsapiSoapClient();
var credentials = new BFSServiceReference.Credentials()
{
    UserName = bfsusername, //Username of administrative user in your instance of BFS
    Password = bfspassword, //Password of the administrative user in your instance of BFS
};
var accounttypes = client.GetAccountTypes(new BFSServiceReference.GetAccountTypeRequest()
{
    Credentials = credentials,
    identify = bfsidentifier, //Identifier is a unique token for your instance of BFS       
    Fields = new BFSServiceReference.GetAccountTypeFields()
    {
        BrickId = true,
        Key = true,
    },
});
foreach (var c in accounttypes.Result)
{
    Console.WriteLine(c.BrickId + "," + c.Key);
}