Silverlight: Dynamic OrderBy

There has got to be a better way to dynamically order a Silverlight Blade query.

Please advise.

var accounts = (IEntityQuery<Account>)accountQuery;
var orderedQuery = accounts.OrderBy(a => a.AccountName);

if(DefaultSortDirection == ListSortDirection.Ascending)
{
    switch (DefaultSortColumn.ToLower())
    {
        case "accountname":
            orderedQuery = accounts.OrderBy(a => a.AccountName);
            break;
        case "accountid":
            orderedQuery = accounts.OrderBy(a => a.AccountID);
            break;
        case "accountsubtype":
            orderedQuery = accounts.OrderBy(a => a.AccountSubtype);
            break;
        case "accounttype":
            orderedQuery = accounts.OrderBy(a => a.AccountType);
            break;
        case "address1":
            orderedQuery = accounts.OrderBy(a => a.Address1);
            break;
        }
}
else
{
    switch (DefaultSortColumn.ToLower())
    {
    case "accountname":
        orderedQuery = accounts.OrderByDescending(a => a.AccountName);
        break;
    case "accountid":
        orderedQuery = accounts.OrderByDescending(a => a.AccountID);
        break;
    case "accountsubtype":
        orderedQuery = accounts.OrderByDescending(a => a.AccountSubtype);
        break;
    case "accounttype":
        orderedQuery = accounts.OrderByDescending(a => a.AccountType);
        break;
    case "address1":
        orderedQuery = accounts.OrderByDescending(a => a.Address1);
        break;
    }
}

return orderedQuery;