# Microsoft.Extensions.Configuration

``` diff
 namespace Microsoft.Extensions.Configuration {
-    public sealed class ConfigurationManager : IConfiguration, IConfigurationBuilder, IConfigurationRoot, IDisposable
+    public sealed class ConfigurationManager : IConfiguration, IConfigurationBuilder, IConfigurationManager, IConfigurationRoot, IDisposable
+    public interface IConfigurationManager : IConfiguration, IConfigurationBuilder
 }
```

