Merchant Account

var gateway = new BraintreeGateway {
    Environment = Braintree.Environment.SANDBOX,
    MerchantId = "MERCHANT_ID",
    PublicKey = "PUBLIC_KEY",
    PrivateKey = "PRIVATE_KEY"
};
PaginatedCollection<merchantaccount> merchantAccountResults = gateway.MerchantAccount.All();
foreach (var merchantAccount in merchantAccountResults) {
    Console.Out.WriteLine(merchantAccount.CurrencyIsoCode);
}