/// <summary>
/// Gets the new instance of request parameters.
/// </summary>
/// <param name="resource">The resource.</param>
/// <param name="clientId">The client identifier.</param>
/// <param name="userCredential">The user credential.</param>
private static object GetNewInstanceOfRequestParameters(string resource, string clientId, UserCredential userCredential)
{
var builder = new StringBuilder();
var typeOfParameters = Type.GetType("Microsoft.IdentityModel.Clients.ActiveDirectory.RequestParameters, Microsoft.IdentityModel.Clients.ActiveDirectory");
var arguments = new object[] { builder };
var instanceOfParameters = (Dictionary <string, string>)Activator.CreateInstance(type: typeOfParameters, args: arguments);
// Prepare request parameters to be sent over the wire
instanceOfParameters.Add("grant_type", "password");
instanceOfParameters.Add("resource", resource);
instanceOfParameters.Add("username", userCredential.UserName);
instanceOfParameters.AddSecureParameter("password", userCredential.SecurePassword());
instanceOfParameters.Add("client_id", clientId);
return(instanceOfParameters);
}