C# sample code

The C# sample API client can be downloaded from here.

Note: SalesInvoices should now be named SalesOrders.

Generating the method signature

    private static string GetSignature(string args, string privatekey) 
    { 
        var encoding = new System.Text.UTF8Encoding(); 
        byte[] key = encoding.GetBytes(privatekey); 
        var myhmacsha256 = new HMACSHA256(key); 
        byte[] hashValue = myhmacsha256.ComputeHash(encoding.GetBytes(args)); 
        string hmac64 = Convert.ToBase64String(hashValue); 
        myhmacsha256.Clear(); 
        return hmac64; 
    }

Use the API Sandbox to see how the object is rendered in JSON or XML.

Note: An Unleashed account is required before you can use the API Sandbox.

Trial accounts are also allowed to connect to the API.
You can register a new account here: Register.