SalesforceClient.cs

public class SalesforceClient
{
    private const string LOGIN_ENDPOINT = "https://login.salesforce.com/services/oauth2/token";
    private const string API_ENDPOINT = "/services/data/v36.0/";

    public string Username { get; set; }
    public string Password { get; set; }
    public string Token { get; set; }
    public string ClientId { get; set; }
    public string ClientSecret { get; set; }
    public string AuthToken { get; set; }
    public string InstanceUrl { get; set; }
}