diff --git a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityAggregate.cs b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityAggregate.cs
index 2887989bb..b15fa015a 100644
--- a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityAggregate.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityAggregate.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics;
 
 namespace OpenTelemetry.Exporter.ZPages.Implementation
diff --git a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityTracker.cs b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityTracker.cs
index b09279f88..e9200db69 100644
--- a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityTracker.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesActivityTracker.cs
@@ -14,9 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Timers;
 
 namespace OpenTelemetry.Exporter.ZPages.Implementation
diff --git a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesExporterEventSource.cs b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesExporterEventSource.cs
index cba2dbffa..acdddea8b 100644
--- a/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesExporterEventSource.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/Implementation/ZPagesExporterEventSource.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics.Tracing;
 using OpenTelemetry.Internal;
 
diff --git a/src/OpenTelemetry.Exporter.ZPages/OpenTelemetry.Exporter.ZPages.csproj b/src/OpenTelemetry.Exporter.ZPages/OpenTelemetry.Exporter.ZPages.csproj
index ec323b75c..e5b6fbc3f 100644
--- a/src/OpenTelemetry.Exporter.ZPages/OpenTelemetry.Exporter.ZPages.csproj
+++ b/src/OpenTelemetry.Exporter.ZPages/OpenTelemetry.Exporter.ZPages.csproj
@@ -8,7 +8,6 @@
 
     <!-- this is temporary. will remove in future PR. -->
     <Nullable>disable</Nullable>
-    <ImplicitUsings>disable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterHelperExtensions.cs b/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterHelperExtensions.cs
index 26eba5968..3520b3a5d 100644
--- a/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterHelperExtensions.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterHelperExtensions.cs
@@ -14,8 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-
 using OpenTelemetry.Exporter.ZPages;
 using OpenTelemetry.Internal;
 
diff --git a/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterStatsHttpServer.cs b/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterStatsHttpServer.cs
index af40141fe..360a12e2a 100644
--- a/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterStatsHttpServer.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/ZPagesExporterStatsHttpServer.cs
@@ -14,12 +14,8 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Collections.Concurrent;
-using System.IO;
 using System.Net;
-using System.Threading;
-using System.Threading.Tasks;
 using OpenTelemetry.Exporter.ZPages.Implementation;
 using OpenTelemetry.Internal;
 
diff --git a/src/OpenTelemetry.Exporter.ZPages/ZPagesProcessor.cs b/src/OpenTelemetry.Exporter.ZPages/ZPagesProcessor.cs
index 87d892b36..bb380245c 100644
--- a/src/OpenTelemetry.Exporter.ZPages/ZPagesProcessor.cs
+++ b/src/OpenTelemetry.Exporter.ZPages/ZPagesProcessor.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics;
 using OpenTelemetry.Exporter.ZPages.Implementation;
 using OpenTelemetry.Trace;
diff --git a/src/OpenTelemetry.Extensions.Hosting/Implementation/HostingExtensionsEventSource.cs b/src/OpenTelemetry.Extensions.Hosting/Implementation/HostingExtensionsEventSource.cs
index 164695c61..f23f3a862 100644
--- a/src/OpenTelemetry.Extensions.Hosting/Implementation/HostingExtensionsEventSource.cs
+++ b/src/OpenTelemetry.Extensions.Hosting/Implementation/HostingExtensionsEventSource.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics.Tracing;
 using OpenTelemetry.Internal;
 
diff --git a/src/OpenTelemetry.Extensions.Hosting/Implementation/TelemetryHostedService.cs b/src/OpenTelemetry.Extensions.Hosting/Implementation/TelemetryHostedService.cs
index 7b3c0d667..612175c1a 100644
--- a/src/OpenTelemetry.Extensions.Hosting/Implementation/TelemetryHostedService.cs
+++ b/src/OpenTelemetry.Extensions.Hosting/Implementation/TelemetryHostedService.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics;
-using System.Threading;
-using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using OpenTelemetry.Metrics;
diff --git a/src/OpenTelemetry.Extensions.Hosting/Metrics/MeterProviderBuilderExtensions.cs b/src/OpenTelemetry.Extensions.Hosting/Metrics/MeterProviderBuilderExtensions.cs
index d0056b284..520c40bf2 100644
--- a/src/OpenTelemetry.Extensions.Hosting/Metrics/MeterProviderBuilderExtensions.cs
+++ b/src/OpenTelemetry.Extensions.Hosting/Metrics/MeterProviderBuilderExtensions.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace OpenTelemetry.Metrics
diff --git a/src/OpenTelemetry.Extensions.Hosting/OpenTelemetry.Extensions.Hosting.csproj b/src/OpenTelemetry.Extensions.Hosting/OpenTelemetry.Extensions.Hosting.csproj
index cbef7b08d..abefb22d1 100644
--- a/src/OpenTelemetry.Extensions.Hosting/OpenTelemetry.Extensions.Hosting.csproj
+++ b/src/OpenTelemetry.Extensions.Hosting/OpenTelemetry.Extensions.Hosting.csproj
@@ -7,7 +7,6 @@
 
     <!-- this is temporary. will remove in future PR. -->
     <Nullable>disable</Nullable>
-    <ImplicitUsings>disable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/OpenTelemetry.Extensions.Hosting/OpenTelemetryServicesExtensions.cs b/src/OpenTelemetry.Extensions.Hosting/OpenTelemetryServicesExtensions.cs
index 3fcbc7b2e..84f8560fd 100644
--- a/src/OpenTelemetry.Extensions.Hosting/OpenTelemetryServicesExtensions.cs
+++ b/src/OpenTelemetry.Extensions.Hosting/OpenTelemetryServicesExtensions.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using OpenTelemetry.Extensions.Hosting.Implementation;
diff --git a/src/OpenTelemetry.Extensions.Hosting/Trace/TracerProviderBuilderExtensions.cs b/src/OpenTelemetry.Extensions.Hosting/Trace/TracerProviderBuilderExtensions.cs
index 95b3a57d2..f22cabab2 100644
--- a/src/OpenTelemetry.Extensions.Hosting/Trace/TracerProviderBuilderExtensions.cs
+++ b/src/OpenTelemetry.Extensions.Hosting/Trace/TracerProviderBuilderExtensions.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace OpenTelemetry.Trace
diff --git a/src/OpenTelemetry.Extensions.Propagators/B3Propagator.cs b/src/OpenTelemetry.Extensions.Propagators/B3Propagator.cs
index 8e84315fc..13559bd11 100644
--- a/src/OpenTelemetry.Extensions.Propagators/B3Propagator.cs
+++ b/src/OpenTelemetry.Extensions.Propagators/B3Propagator.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using System.Text;
 using OpenTelemetry.Context.Propagation;
 using OpenTelemetry.Internal;
diff --git a/src/OpenTelemetry.Extensions.Propagators/JaegerPropagator.cs b/src/OpenTelemetry.Extensions.Propagators/JaegerPropagator.cs
index a3fa2e98d..c51bc62d2 100644
--- a/src/OpenTelemetry.Extensions.Propagators/JaegerPropagator.cs
+++ b/src/OpenTelemetry.Extensions.Propagators/JaegerPropagator.cs
@@ -14,10 +14,7 @@
 // limitations under the License.
 // </copyright>
 
-using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using OpenTelemetry.Context.Propagation;
 using OpenTelemetry.Internal;
 
diff --git a/src/OpenTelemetry.Extensions.Propagators/OpenTelemetry.Extensions.Propagators.csproj b/src/OpenTelemetry.Extensions.Propagators/OpenTelemetry.Extensions.Propagators.csproj
index 7247ecd8f..c61603b6b 100644
--- a/src/OpenTelemetry.Extensions.Propagators/OpenTelemetry.Extensions.Propagators.csproj
+++ b/src/OpenTelemetry.Extensions.Propagators/OpenTelemetry.Extensions.Propagators.csproj
@@ -9,7 +9,6 @@
 
     <!-- this is temporary. will remove in future PR. -->
     <Nullable>disable</Nullable>
-    <ImplicitUsings>disable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/OpenTelemetry.Extensions.Propagators/OpenTelemetryPropagatorsEventSource.cs b/src/OpenTelemetry.Extensions.Propagators/OpenTelemetryPropagatorsEventSource.cs
index 1e3163a0b..da15e0ee9 100644
--- a/src/OpenTelemetry.Extensions.Propagators/OpenTelemetryPropagatorsEventSource.cs
+++ b/src/OpenTelemetry.Extensions.Propagators/OpenTelemetryPropagatorsEventSource.cs
@@ -14,7 +14,6 @@
 // limitations under the License.
 // </copyright>
 
-using System;
 using System.Diagnostics.Tracing;
 
 namespace OpenTelemetry.Internal