var context =  new OAuthContext(ConsumerKey, ConsumerSecret, RequestUrl, AuthorizeUrl, AccessUrl, CallbackUrl);

var client =  new Client(context);

String requestTokenResponse = await client.MakeRequest("GET")
                    .ForRequestToken()
                    .WithParameters( new { scope = "email"} ) //Optional, changes depending on provider
                    .Sign()
                    .ExecuteRequest();
                    
client.RequestToken = TokenContainer.Parse(requestTokenResponse);

Uri authorizationUri = client.GetAuthorizationUri();
                    
//Authorize the temporary token using the authorizationUri
//One option is to use the supplied WebAuthenticationBroker
WebAuthenticationResult WebAuthenticationResult = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, authorizationUri, client.Context.CallbackUri);

//The verification code could be returned in the response
//i.e. Parse it out of WebAuthenticationResult.ResponseData.ToString();
//Or it could be displayed to the user and they will have to enter it into your application manually
String verificationCode = ... 

String accessTokenResponse = await client.MakeRequest("GET")
                    .ForAccessToken(client.RequestToken.Token, verificationCode)
                    .Sign(client.RequestToken.Secret)
                    .ExecuteRequest();
                    
client.AccessToken = TokenContainer.Parse(accessTokenResponse);

String getResponse = await client.MakeRequest("GET")
                  .ForResource(client.AccessToken.Token, protectedResourceUri)
                  .WithParameters(new { param = "value" }) //it's important to add the prameters after the resource, internal paramerters reset on ForResource calls
                  .Sign(client.AccessToken.Secret)
                  .ExecuteRequest();
                  
String postResponse = await client.MakeRequest("POST")
                  .WithData(data)
                  .ForResource(client.AccessToken.Token, protectedResourceUri)
                  .Sign(client.AccessToken.Secret)
                  .ExecuteRequest();

String postResponse = await client.MakeRequest("POST")
                  .WithFormEncodedData(new {name = "Peter"}) //this will be sent as a key/value in the request body an is included in the OAuth signature
                  .ForResource(client.AccessToken.Token, protectedResourceUri)
                  .Sign(client.AccessToken.Secret)
                  .ExecuteRequest();