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Merged
merged 1 commit into from
Nov 13, 2025
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[FSSDK-11956] CMAB Release C# #396

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44 changes: 44 additions & 0 deletions CHANGELOG.md
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# Optimizely C# SDK Changelog

## 4.2.0
Nov 13, 2025

### New Features

- **Added support for Contextual Multi-Armed Bandit (CMAB)**: Added support for CMAB experiments(Contextual Bandits rules) with new configuration options and cache control. To get decision from CMAB rules, `decide` and related methods must be used.

#### CMAB Configuration Options

The following new configuration options have been added for CMAB:

```csharp
using OptimizelySDK;

// Configure CMAB settings before creating the Optimizely instance
var cmabConfig = new CmabConfig()
.SetCacheSize(1000) // Optional: Set CMAB cache size (default: 1000)
.SetCacheTtl(TimeSpan.FromMinutes(30)); // Optional: Set CMAB cache TTL (default: 30 minutes)
// .SetCache(customCache) // Optional: Custom cache implementation
OptimizelyFactory.SetCmabConfig(cmabConfig);

var optimizely = OptimizelyFactory.NewDefaultInstance("SDK_KEY_HERE");
```

#### CMAB-Related OptimizelyDecideOptions

New decide options are available to control CMAB caching behavior:

- `OptimizelyDecideOption.IGNORE_CMAB_CACHE`: Bypass CMAB cache for fresh decisions
- `OptimizelyDecideOption.RESET_CMAB_CACHE`: Clear and reset CMAB cache before making decisions
- `OptimizelyDecideOption.INVALIDATE_USER_CMAB_CACHE`: Invalidate CMAB cache for the particular user and experiment

```csharp
using OptimizelySDK.OptimizelyDecisions;

// Example usage with CMAB decide options
var user = optimizely.CreateUserContext("user123");
var decision = user.Decide("feature-flag-key", new[]
{
OptimizelyDecideOption.IGNORE_CMAB_CACHE
});
```

## 4.1.0
November 7th, 2024

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6 changes: 3 additions & 3 deletions OptimizelySDK.DemoApp/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK.Net35/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK.Net40/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK.NetStandard16/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK.NetStandard20/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK.Tests/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
6 changes: 3 additions & 3 deletions OptimizelySDK/Properties/AssemblyInfo.cs
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//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("4.1.0.0")]
[assembly: AssemblyFileVersion("4.1.0.0")]
[assembly: AssemblyInformationalVersion("4.1.0")] // Used by NuGet.
[assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyFileVersion("4.2.0.0")]
[assembly: AssemblyInformationalVersion("4.2.0")] // Used by NuGet.
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -104,7 +104,7 @@ User can provide variables using following procedure:
```
<configSections>
<section name="optlySDKConfigSection"
type="OptimizelySDK.OptimizelySDKConfigSection, OptimizelySDK, Version=4.1.0.0, Culture=neutral, PublicKeyToken=null" />
type="OptimizelySDK.OptimizelySDKConfigSection, OptimizelySDK, Version=4.2.0.0, Culture=neutral, PublicKeyToken=null" />
</configSections>
```
2. Now add **optlySDKConfigSection** below **<configSections>**. In this section you can add and set following **HttpProjectConfigManager** and **BatchEventProcessor** variables:
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