Programming language: C#
License: Apache License 2.0
Latest version: v2.25.0

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Square Connect .NET SDK - RETIRED

Build Status NuGet version

Apache-2 license

NOTICE: Square Connect .NET SDK retired

The Square Connect .NET SDK is retired (EOL) as of 2019-12-17 and will no longer receive bug fixes or product updates. To continue receiving API and SDK improvements, please follow the instructions below to migrate to the new Square .NET SDK.

The old Connect SDK documentation is available under the [/docs folder](./docs/README.md).

Migrate to the Square .NET SDK

Follow the instructions below to migrate your apps from the deprecated Square.Connect library to the new Square library.

Update your package

Replace Square.Connect with the new Square package and update the version.

Update your code

  1. Change all instances of using Square.Connect.Api to using Square.
  2. Change all instances of using Square.Connect.Model to using Square.Models.
  3. Remove all instances of using Square.Connect.Client.
  4. Add a reference to using Square.Exceptions to anything that calls an endpoint.
  5. Update client instantiation to follow the method outlined below.

To simplify your code, we also recommend that you use method chaining to access APIs instead of explicitly instantiating multiple clients.

Client instantiation
SquareClient square = new SquareClient.Builder()
// e.g to fetch a list of locations
var response = square.LocationsApi.ListLocationsAsync();

Example code migration

As a specific example, consider the code used to create a new customer profile with the following CreateCustomerRequest object:

var bodyAddress = new Address.Builder()
    .AddressLine1("500 Electric Ave")
    .AddressLine2("Suite 600")
    .Locality("New York")
var body = new CreateCustomerRequest.Builder()
    .EmailAddress("[email protected]")
    .Note("a customer")

With the deprecated Square.Connect library, this is how you instantiate a client for the Customers API, format the request, and call the endpoint:

using System;
using System.Diagnostics;
using Square.Connect.Api;
using Square.Connect.Client;
using Square.Connect.Model;

// Instantiate the client
var configuration = new Configuration(new ApiClient("https://connect.squareupsandbox.com"));
configuration.AccessToken = "YOUR_SANDBOX_ACCESS_TOKEN";
var customersApi = new CustomersApi(configuration);

// Call the endpoint and handle the response
  // CreateCustomer
  CreateCustomerResponse result = customersApi.CreateCustomer(body);
catch (Exception e)
  Debug.Print("Exception when calling CustomersApi.CreateCustomer: " + e.Message );

Now consider equivalent code using the new Square library:

using Square;
using Square.Models;
using Square.Exceptions;

// Instantiate the client
SquareClient square = new SquareClient.Builder()

// Call the endpoint and handle the response
    CreateCustomerResponse result = square.CustomersApi.CreateCustomerAsync(body).Result;
    // Business logic
catch (APIException e)
    // Error Handling

That's it!

What was once a multi-block process can be handled in 1 line of code. Migrating to the Square library reduces boilerplate and lets you focus on the parts of your code that really matter.

Ask the community

Please join us in our Square developer community if you have any questions!

*Note that all licence references and agreements mentioned in the Square README section above are relevant to that project's source code only.