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.Net (C#) SDK

This section describes how to set up and install the .NET (C#) SDK and how to deploy a feature flag.

Getting started with .Net (C#) SDK

Step 1: Setting up

To setup .Net (C#) SDK, follow these steps:

  1. A Rollout account. See Signup Page to create an account.

  2. An Application created in the Rollout dashboard.

    • The first time you log into your account, click the Create New App button to create a new app.
  1. An environment key.
    • Get the key from App Settings > Environment > Key

Step 2: Installing the .Net (C#) SDK

Add the CloudBees Rollout .Net (C#) package to your application

To add the Rollout .Net (C#) library to your application, add the nuget library rox-server or use the command line:

# Add the Rollout SDK to your project
$ Install-Package rox-server

# Add the Rollout SDK to your project
$ dotnet add package rox-server

Add the following lines of code to your application

using Io.Rollout.Rox.Server;
using Io.Rollout.Rox.Core.Entities;
using Io.Rollout.Rox.Server.Flags;
using System;
using System.Threading.Tasks;

namespace dotnet
  // Create a Roxflag in the Flag continer class
  public class Flags : IRoxContainer {
    public RoxFlag enableTutorial = new RoxFlag(false);
    public RoxVariant titleColors = new RoxVariant("White", new String[] {"White", "Blue", "Green"});

    class Program
        static async Task Main(string[] args)
            Flags flags = new Flags();

            // Register the flag container with Rollout
            Rox.Register("", flags);

            var options = new RoxOptions(new RoxOptions.RoxOptionsBuilder {});

            // Set the Rollout environment key
            await Rox.Setup("<ROLLOUT-ENV-KEY>", options);

            // Boolean flag example
            Console.WriteLine("enableTutorial " + flags.enableTutorial.IsEnabled());

            // Multivariate flag example
            Console.WriteLine("titleColors value is " + flags.titleColors.GetValue());

Container class registration and environment key setup

  • The Rox.register() function must be called before the Rox.setup() function.

  • You can not call Rox.setup() twice in the same runtime.

Run your application.

Running the project

The Flag name is automatically added to the Rollout dashboard after running the application.

Step 3 - Deploying a feature flag

Finding your flags in the Rollout dashboard

After creating feature flags and running your feature code, you can find your flags in the Rollout dashboard.

To find your flags in the Rollout dashboard:

  1. Find your app in the Rollout dashboard
    To switch between apps, click on the app name in the top-left corner of the screen and select the app you want from the pulldown.

  2. Click on Flags on the left side of the navigation panel.

  3. Confirm that your flag is listed in the flag view.

Configuring deployment rules

  1. Go to Rollout's dashboard.
  2. Click on Experiments on the left panel.
  3. Click the Create Experiment button to create a new experiment.
  4. In the New Experiment window:
    • Find the Flag name from the menu, choose it.
    • Click the Set Audience button to continue. The Experiment Details view appears.
  5. Select either True, False, Split or Scheduled. Split allows you to select the percentage of the target group that you want to deploy. Scheduled allows you to schedule a deployment date.
  1. Click Update Audience.


  • You can not delete the default condition.
  • You can click the Reset link to go back to the state from before you started making changes. Reset only appears when you've made saved modifications.

See Audience for more detailed information.

Updated about a month ago

What's Next


.Net (C#) SDK

This section describes how to set up and install the .NET (C#) SDK and how to deploy a feature flag.

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