OptimizelyUserContext for the C# SDK

public class OptimizelyUserContext
{
	public OptimizelyUserContext(Optimizely optimizely,
		string userId,
		UserAttributes userAttributes,
		ForcedDecisionsStore forcedDecisionsStore,
		IErrorHandler errorHandler, ILogger logger);
  
    // Set an attribute for the user
    public void SetAttribute(string key, object value);

    // Get attributes for the user
    public UserAttributes GetAttributes();

    // Make a decision about which flag variation the user buckets into for the flag key 
    public OptimizelyDecision Decide(string key, OptimizelyDecideOption[] options);

    // Make decisions about which flag variations the user buckets into for flag keys
    public Dictionary<string, OptimizelyDecision> DecideForKeys(string[] keys,
	    OptimizelyDecideOption[] options);

    // Make decisions about which flag variations the user buckets into for all flags
    public Dictionary<string, OptimizelyDecision> DecideAll(OptimizelyDecideOption[] options);

    // Track user event
    public void TrackEvent(string eventName, EventTags eventTags);

    // Sets a forced decision (variationKey) for a given decision context
    public bool SetForcedDecision(OptimizelyDecisionContext context,
	    OptimizelyForcedDecision decision);

    // Returns the forced decision (variationKey) for a given decision context
    public OptimizelyForcedDecision GetForcedDecision(OptimizelyDecisionContext context);

    // Removes the forced decision (variationKey) for a given decision context
    public bool RemoveForcedDecision(OptimizelyDecisionContext context);

    // Removes all the forced decisions (variationKeys) for the user context
    public bool RemoveAllForcedDecisions();
    
    /*
     * The following methods require Real-Time Audiences for Feature Experimentation.
     * See the note following the code sample.
     */

    // An array of segment names that the user is qualified for. 
    // The result of **fetchQualifiedSegments()** is saved here. 
    // Can be null if not properly updated with fetchQualifiedSegments(). 
    // 
    // You can read and write directly to the qualified segments array. 
    // This lets you bypass the remote fetching process from ODP 
    // or for utilizing your own fetching service.   
    public List<string> GetQualifiedSegments();
    
    // Set the qualified audiences that the user is qualified for.
    public void SetQualifiedSegments(List<string> qualifiedSegments);

    // Fetch all qualified segments for the user context. 
    // The audiences fetched are saved in the **QualifiedSegments** array
    // and can be accessed any time. 
    public bool FetchQualifiedSegments(List<OdpSegmentOption> segmentOptions = null);

    // Fetch all qualified audiences for the user context in a non-blocking manner. 
    // This method fetches segments in a separate thread and invokes the provided 
    // callback when results are available.
    public Task FetchQualifiedSegments(Action<bool> callback,
	    List<OdpSegmentOption> segmentOptions = null);
    
    //  Check if the user is qualified for the given segment. 
    public bool IsQualifiedFor(string segment);
}