var client = new WrikeClient("permanent_token");

//create the authorization url
var authorizationUrl = WrikeClient.GetAuthorizationUrl(
                ClientId,
                redirectUri: "http://localhost",
                state: "myTestState",
                scope: new List<string> { WrikeScopes.Default, WrikeScopes.wsReadWrite });
//After the user authorizes your client using the authroization url, 
//wrike will redirect user to the provided redirect_uri with the authorization code
//See https://developers.wrike.com/documentation/oauth2 for more details

//create client
var client = new WrikeClient(new WrikeAccessTokenRequest(
                ClientId,
                ClientSecret,
                AuthorizationCode), "redirect_uri");

//refresh token if needed
client.RefreshToken();

var accesTokenResponse = WrikeClient.GetAccesToken(new WrikeAccessTokenRequest(
                ClientId,
                ClientSecret,
                AuthorizationCode), "http://localhost");

var client = new WrikeClient(accesTokenResponse.AccessToken, accesTokenResponse.Host);

//you need new client when you need to refresh token
var refreshTokenResponse = WrikeClient.RefreshToken(ClientId, ClientSecret, 
                accesTokenResponse.RefreshToken, accesTokenResponse.Host);

client = new WrikeClient(refreshTokenResponse.AccessToken, accesTokenResponse.Host);

//create client
var client = new WrikeClient("permanent_token");

//get the list of custom fields
//https://developers.wrike.com/documentation/api/methods/query-custom-fields
var customFields = await client.CustomFields.GetAsync();

//create new custom field
//https://developers.wrike.com/documentation/api/methods/create-custom-field
var newCustomField = new WrikeCustomField("Title", WrikeCustomFieldType.Text);
newCustomField = await client.CustomFields.CreateAsync(newCustomField);

//delete a task
await client.Tasks.DeleteAsync("taskId");

var client = new WrikeClient("permanent_token", customHttpClient: customHttpClientImplementation);

    [Route("api/[controller]")]
    public class WrikeWebHookController : WrikeWebHookControllerBase
    {
        protected override void OnAttachmentAdded(WrikeWebHookEvent wrikeWebHookEvent)
        {
            throw new NotImplementedException();
        }
        
        /*
            implement other events...
        */
     }

//create client
var client = new WrikeClient("permanent_token");
//create new webhook
//https://developers.wrike.com/documentation/webhooks
var newWebHook = new WrikeWebHook("https://<your-host>/api/wrikewebhook");
newWebHook = await client.WebHooks.CreateAsync(newWebHook);