AccountCreate.cs

using System;

using Dropbox.Sign.Api;
using Dropbox.Sign.Client;
using Dropbox.Sign.Model;

public class Example
{
    public static void Main()
    {
        var config = new Configuration();
        // Configure HTTP basic authorization: api_key
        config.Username = "YOUR_API_KEY";

        // or, configure Bearer (JWT) authorization: oauth2
        // config.AccessToken = "YOUR_BEARER_TOKEN";

        var accountApi = new AccountApi(config);

        var data = new AccountCreateRequest(
            emailAddress: "newuser@dropboxsign.com"
        );

        try
        {
            var result = accountApi.AccountCreate(data);
            Console.WriteLine(result);
        }
        catch (ApiException e)
        {
            Console.WriteLine("Exception when calling Dropbox Sign API: " + e.Message);
            Console.WriteLine("Status Code: " + e.ErrorCode);
            Console.WriteLine(e.StackTrace);
        }
    }
}