C#

View the full documentation on GitHub.

Installation

    dotnet add package growthbook-c-sharp

Quick Usage

This library is based on the GrowthBook SDK specs and should be compatible with the usage examples in the GrowthBook docs.

Down below you'll find two basic examples on how the package works.

Basic

1. Declare features

   
   var staticFeatures = new Dictionary<string, Feature>
   {
       {"firstFeature", new Feature{ DefaultValue = true}},
       {"secondFeature", new Feature{ DefaultValue = false}}
   };

2. Create a context and add the features

   var context = new Context
   {
       Enabled = true,
       Url = "",
       Features = staticFeatures
   };

3. Create the GrowthBook object with the context

   using GrowthBook;
   //...
   
   var GrowthBook = new GrowthBook.GrowthBook(context);

4. Check whether a feature is enabled

   GrowthBook.IsOn("firstFeature") // true
   GrowthBook.IsOn("secondFeature") // false

Loading feature definitions from an API

Because feature definitions are typically loaded from API calls or cache, Json.NET objects are used to represent arbitrary document types such as Attributes, Conditions, and Feature values.

To load your features from the GrowthBook API use the following example:

1. Create a result model for the API response

   public class FeaturesResult
   {
       public HttpStatusCode Status { get; set; }
       public IDictionary<string, Feature>? Features { get; set; }
       public DateTimeOffset? DateUpdated { get; set; }
   }

2. call the endpoint and deserialize result

   var url = "YOUR_GROWTHBOOK_URL/api/features/YOUR_API_KEY";
   var response = await client.GetAsync(url);
   
   if (response.IsSuccessStatusCode)
   {
       var content = await response.Content.ReadAsStringAsync();
       var featuresResult = JsonConvert.DeserializeObject<FeaturesResult>(content);
   }

3. Construct a context and initialize GrowthBook

   var GrowthBook = new GrowthBook.GrowthBook(
       new Context {
           Enabled = true,
           Url = "",
           Features = featuresResult.Features,
       }
   );

Generic getters

To make it easier to deal with Feature values, generic getter functions are provided for the following:

• Experiment:
  • GetVariations<T>()
• ExperimentResult:
  • GetValue<T>()
• Feature:
  • GetDefaultValue<T>()
• FeatureResult:
  • GetValue<T>()
• Feature Rule:
  • GetVariations<T>()
• GrowthBook:
  • GetFeatureValue<T>(string key, T fallback)