diff --git a/src/OpenTelemetry/.publicApi/net462/PublicAPI.Unshipped.txt b/src/OpenTelemetry/.publicApi/net462/PublicAPI.Unshipped.txt
index 88503e8c781..c3b425d9b3a 100644
--- a/src/OpenTelemetry/.publicApi/net462/PublicAPI.Unshipped.txt
+++ b/src/OpenTelemetry/.publicApi/net462/PublicAPI.Unshipped.txt
@@ -19,9 +19,9 @@ OpenTelemetry.OpenTelemetryBuilder.WithMetrics() -> OpenTelemetry.OpenTelemetryB
 OpenTelemetry.OpenTelemetryBuilder.WithMetrics(System.Action<OpenTelemetry.Metrics.MeterProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing() -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing(System.Action<OpenTelemetry.Trace.TracerProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
-OpenTelemetry.OpenTelemetryServiceCollectionExtensions
+Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder, System.Func<System.IServiceProvider!, OpenTelemetry.Metrics.MetricReader!>! implementationFactory) -> OpenTelemetry.Metrics.MeterProviderBuilder!
-static OpenTelemetry.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
+static Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader<T>(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder) -> OpenTelemetry.Metrics.MeterProviderBuilder!
 OpenTelemetry.Trace.SamplingResult.TraceStateString.get -> string?
 OpenTelemetry.Trace.SamplingResult.SamplingResult(OpenTelemetry.Trace.SamplingDecision decision, string! traceStateString) -> void
diff --git a/src/OpenTelemetry/.publicApi/net6.0/PublicAPI.Unshipped.txt b/src/OpenTelemetry/.publicApi/net6.0/PublicAPI.Unshipped.txt
index 88503e8c781..c3b425d9b3a 100644
--- a/src/OpenTelemetry/.publicApi/net6.0/PublicAPI.Unshipped.txt
+++ b/src/OpenTelemetry/.publicApi/net6.0/PublicAPI.Unshipped.txt
@@ -19,9 +19,9 @@ OpenTelemetry.OpenTelemetryBuilder.WithMetrics() -> OpenTelemetry.OpenTelemetryB
 OpenTelemetry.OpenTelemetryBuilder.WithMetrics(System.Action<OpenTelemetry.Metrics.MeterProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing() -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing(System.Action<OpenTelemetry.Trace.TracerProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
-OpenTelemetry.OpenTelemetryServiceCollectionExtensions
+Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder, System.Func<System.IServiceProvider!, OpenTelemetry.Metrics.MetricReader!>! implementationFactory) -> OpenTelemetry.Metrics.MeterProviderBuilder!
-static OpenTelemetry.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
+static Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader<T>(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder) -> OpenTelemetry.Metrics.MeterProviderBuilder!
 OpenTelemetry.Trace.SamplingResult.TraceStateString.get -> string?
 OpenTelemetry.Trace.SamplingResult.SamplingResult(OpenTelemetry.Trace.SamplingDecision decision, string! traceStateString) -> void
diff --git a/src/OpenTelemetry/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt b/src/OpenTelemetry/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt
index 88503e8c781..c3b425d9b3a 100644
--- a/src/OpenTelemetry/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt
+++ b/src/OpenTelemetry/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt
@@ -19,9 +19,9 @@ OpenTelemetry.OpenTelemetryBuilder.WithMetrics() -> OpenTelemetry.OpenTelemetryB
 OpenTelemetry.OpenTelemetryBuilder.WithMetrics(System.Action<OpenTelemetry.Metrics.MeterProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing() -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing(System.Action<OpenTelemetry.Trace.TracerProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
-OpenTelemetry.OpenTelemetryServiceCollectionExtensions
+Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder, System.Func<System.IServiceProvider!, OpenTelemetry.Metrics.MetricReader!>! implementationFactory) -> OpenTelemetry.Metrics.MeterProviderBuilder!
-static OpenTelemetry.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
+static Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader<T>(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder) -> OpenTelemetry.Metrics.MeterProviderBuilder!
 OpenTelemetry.Trace.SamplingResult.TraceStateString.get -> string?
 OpenTelemetry.Trace.SamplingResult.SamplingResult(OpenTelemetry.Trace.SamplingDecision decision, string! traceStateString) -> void
diff --git a/src/OpenTelemetry/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt b/src/OpenTelemetry/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt
index 88503e8c781..c3b425d9b3a 100644
--- a/src/OpenTelemetry/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt
+++ b/src/OpenTelemetry/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt
@@ -19,9 +19,9 @@ OpenTelemetry.OpenTelemetryBuilder.WithMetrics() -> OpenTelemetry.OpenTelemetryB
 OpenTelemetry.OpenTelemetryBuilder.WithMetrics(System.Action<OpenTelemetry.Metrics.MeterProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing() -> OpenTelemetry.OpenTelemetryBuilder!
 OpenTelemetry.OpenTelemetryBuilder.WithTracing(System.Action<OpenTelemetry.Trace.TracerProviderBuilder!>! configure) -> OpenTelemetry.OpenTelemetryBuilder!
-OpenTelemetry.OpenTelemetryServiceCollectionExtensions
+Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder, System.Func<System.IServiceProvider!, OpenTelemetry.Metrics.MetricReader!>! implementationFactory) -> OpenTelemetry.Metrics.MeterProviderBuilder!
-static OpenTelemetry.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
+static Microsoft.Extensions.DependencyInjection.OpenTelemetryServiceCollectionExtensions.AddOpenTelemetry(this Microsoft.Extensions.DependencyInjection.IServiceCollection! services) -> OpenTelemetry.OpenTelemetryBuilder!
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddReader<T>(this OpenTelemetry.Metrics.MeterProviderBuilder! meterProviderBuilder) -> OpenTelemetry.Metrics.MeterProviderBuilder!
 OpenTelemetry.Trace.SamplingResult.TraceStateString.get -> string?
 OpenTelemetry.Trace.SamplingResult.SamplingResult(OpenTelemetry.Trace.SamplingDecision decision, string! traceStateString) -> void
diff --git a/src/OpenTelemetry/OpenTelemetryServiceCollectionExtensions.cs b/src/OpenTelemetry/OpenTelemetryServiceCollectionExtensions.cs
index 2541a85f7bb..33ba9970cbb 100644
--- a/src/OpenTelemetry/OpenTelemetryServiceCollectionExtensions.cs
+++ b/src/OpenTelemetry/OpenTelemetryServiceCollectionExtensions.cs
@@ -16,11 +16,11 @@
 
 #nullable enable
 
-using Microsoft.Extensions.DependencyInjection;
+using OpenTelemetry;
 using OpenTelemetry.Metrics;
 using OpenTelemetry.Trace;
 
-namespace OpenTelemetry;
+namespace Microsoft.Extensions.DependencyInjection;
 
 /// <summary>
 /// Contains <see cref="IServiceCollection"/> extension methods for registering OpenTelemetry SDK artifacts.
diff --git a/test/OpenTelemetry.Extensions.Hosting.Tests/TelemetryHostedServiceTests.cs b/test/OpenTelemetry.Extensions.Hosting.Tests/TelemetryHostedServiceTests.cs
index 3900a74028f..d61d4015a5a 100644
--- a/test/OpenTelemetry.Extensions.Hosting.Tests/TelemetryHostedServiceTests.cs
+++ b/test/OpenTelemetry.Extensions.Hosting.Tests/TelemetryHostedServiceTests.cs
@@ -14,6 +14,7 @@
 // limitations under the License.
 // </copyright>
 
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using OpenTelemetry.Trace;
 using Xunit;