chore: prepare for Yggdrasil with deprecations of changing API (#237)

src/Unleash/DefaultUnleash.cs

@@ -56,6 +56,7 @@ public DefaultUnleash(UnleashSettings settings, params IStrategy[] strategies)
  ///// <param name="config">Unleash settings</param>
  ///// <param name="overrideDefaultStrategies">When true, it overrides the default strategies.</param>
  ///// <param name="strategies">Custom strategies.</param>
+ [Obsolete("Will be removed in the next major version", false)]
  public DefaultUnleash(UnleashSettings settings, bool overrideDefaultStrategies, params IStrategy[] strategies)
  {
  var currentInstanceNo = Interlocked.Increment(ref InitializedInstanceCount);
@@ -82,6 +83,7 @@ public DefaultUnleash(UnleashSettings settings, bool overrideDefaultStrategies,
  }
 
  /// <inheritdoc />
+ [Obsolete("This property will be removed in the next major release", false)]
  public ICollection<FeatureToggle> FeatureToggles => services.ToggleCollection.Instance.Features;
 
  private EventCallbackConfig EventConfig { get; } = new EventCallbackConfig();
@@ -269,11 +271,13 @@ public Variant GetVariant(string toggleName, UnleashContext context, Variant def
  return evaluationResult.Variant;
  }
 
+ [Obsolete("Will be removed in the next major version", false)]
  public IEnumerable<VariantDefinition> GetVariants(string toggleName)
  {
  return GetVariants(toggleName, services.ContextProvider.Context);
  }
 
+ [Obsolete("Will be removed in the next major version", false)]
  public IEnumerable<VariantDefinition> GetVariants(string toggleName, UnleashContext context)
  {
  if (!IsEnabled(toggleName, context)) return null;

src/Unleash/IUnleash.cs

@@ -14,6 +14,7 @@ public interface IUnleash : IDisposable
  /// <summary>
  /// Collection of currently loaded Feature Toggles
  /// </summary>
+ [Obsolete("Will be removed in the next major version", false)]
  ICollection<FeatureToggle> FeatureToggles { get; }
 
  /// <summary>
@@ -73,6 +74,7 @@ public interface IUnleash : IDisposable
  /// </summary>
  /// <param name="toggleName">The name of the toggle.</param>
  /// <returns>A list of available variants.</returns>
+ [Obsolete("Will be removed in the next major version", false)]
  IEnumerable<VariantDefinition> GetVariants(string toggleName);
 
  /// <summary>
@@ -81,6 +83,7 @@ public interface IUnleash : IDisposable
  /// <param name="toggleName">The name of the toggle.</param>
  /// /// <param name="context">The Unleash context to evaluate the toggle state against.</param>
  /// <returns>A list of available variants.</returns>
+ [Obsolete("Will be removed in the next major version", false)]
  IEnumerable<VariantDefinition> GetVariants(string toggleName, UnleashContext context);
 
  void ConfigureEvents(Action<EventCallbackConfig> config);

src/Unleash/Internal/IToggleBootstrapProvider.cs

@@ -6,6 +6,7 @@ namespace Unleash.Internal
 {
  public interface IToggleBootstrapProvider
  {
+ [Obsolete("Will be replaced in the next major version", false)]
  ToggleCollection Read();
  }
 }

src/Unleash/Utilities/ToggleBootstrapFileProvider.cs

@@ -17,6 +17,7 @@ internal ToggleBootstrapFileProvider(string filePath, UnleashSettings settings)
  this.settings = settings;
  }
 
+ [Obsolete("Will be replaced in the next major version", false)]
  public ToggleCollection Read()
  {
  using (var togglesStream = settings.FileSystem.FileOpenRead(filePath))

src/Unleash/Utilities/ToggleBootstrapUrlProvider.cs

@@ -30,7 +30,7 @@ public ToggleBootstrapUrlProvider(string path, HttpClient client, UnleashSetting
  this.throwOnFail = throwOnFail;
  this.customHeaders = customHeaders;
  }
-
+ [Obsolete("Will be replaced in the next major version", false)]
  public ToggleCollection Read()
  {
  return Task.Run(() => FetchFile()).GetAwaiter().GetResult();