StripeConfiguration.SetApiKey("[your api key here]");

var planService = new StripePlanService();
planService.Get(*planId*, new StripeRequestOptions() { ApiKey = "[your api key here]" });

var requestOptions = new StripeRequestOptions();
requestOptions.ApiKey = "SECRET API KEY";                        // (optional) set the api key on a per-request basis
requestOptions.IdempotencyKey = "SOME STRING";                   // (optional) create an idempotent request
requestOptions.StripeConnectAccountId = "CONNECTED ACCOUNT ID";  // (optional) authenticate as a connected account

var chargeService = new StripeChargeService();
StripeCharge charge = chargeService.Create(...);
StripeResponse response = charge.StripeResponse;

public class StripeResponse
{
	// ResponseJson will always tell you the complete json Stripe returned to Stripe.net.
	// this will be the same as the ObjectJson when you execute a create/get/delete call.
	// however, if you execute a List() method, the ResponseJson will have the full api result
	// from Stripe (a charge list with 10 charges, for example).
	public string ResponseJson { get; set; }

	// when you call a List() method, the object json is the object in the response array that represents
	// the entity. The ResponseJson will be the full array returned from Stripe on every entity, however,
	// since that was the full response from Stripe. ObjectJson is always the same as ResponseJson when
	// you are doing a regular create/get/delete, because you are dealing with a single object.
	public string ObjectJson { get; set; }

	// this is the request id of the call, as seen in the Stripe dashboard. I would recommend logging
	// this and/or saving it to your database. this is very useful to help you find your request
	// in the dashboard, or ask Stripe a question about your api call
	public string RequestId { get; set; }

	// this is the request date and time of the call. I would also recommend logging this and/or
	// saving it to your database, as it tells you when Stripe processed the request.
	public DateTime RequestDate { get; set; }
}

var chargeService = new StripeChargeService();

var chargesToday = chargeService.List(new StripeChargeListOptions {
	Created = new StripeDateFilter { GreaterThanOrEqual = DateTime.UtcNow.Date }
});

var chargesYesterday = chargeService.List(new StripeChargeListOptions {
	Created = new StripeDateFilter {
		GreaterThanOrEqual = DateTime.Now.AddDays(-1).Date,
		LessThan = DateTime.Now.Date
	}
});