diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d8cf9f998..bd8040a51 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -51,13 +51,13 @@ On all platforms, the minimum requirements are:
 * Visual Studio for Mac or Visual Studio Code
 
 Mono might be required by your IDE but is not required by this project. This is
-because unit tests targeting .NET Framework (i.e: `net46`) are disabled outside
+because unit tests targeting .NET Framework (i.e: `net461`) are disabled outside
 of Windows.
 
 ### Windows
 
 * Visual Studio 2017+ or Visual Studio Code
-* .NET Framework 4.6+
+* .NET Framework 4.6.1+
 
 ### Public API
 
diff --git a/src/OpenTelemetry.Api/OpenTelemetry.Api.csproj b/src/OpenTelemetry.Api/OpenTelemetry.Api.csproj
index d5d3e1963..76ed1bb93 100644
--- a/src/OpenTelemetry.Api/OpenTelemetry.Api.csproj
+++ b/src/OpenTelemetry.Api/OpenTelemetry.Api.csproj
@@ -8,7 +8,7 @@
     <MinVerTagPrefix>core-</MinVerTagPrefix>
   </PropertyGroup>
 
-  <!--Do not run ApiCopmat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
+  <!--Do not run ApiCompat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
   Remove this property once we have released a stable net461 version.-->
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <RunApiCompat>false</RunApiCompat>
diff --git a/src/OpenTelemetry.Exporter.Jaeger/OpenTelemetry.Exporter.Jaeger.csproj b/src/OpenTelemetry.Exporter.Jaeger/OpenTelemetry.Exporter.Jaeger.csproj
index 77427f094..1b264bc21 100644
--- a/src/OpenTelemetry.Exporter.Jaeger/OpenTelemetry.Exporter.Jaeger.csproj
+++ b/src/OpenTelemetry.Exporter.Jaeger/OpenTelemetry.Exporter.Jaeger.csproj
@@ -7,7 +7,7 @@
     <MinVerTagPrefix>core-</MinVerTagPrefix>
   </PropertyGroup>
 
-  <!--Do not run ApiCopmat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
+  <!--Do not run ApiCompat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
   Remove this property once we have released a stable net461 version.-->
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <RunApiCompat>false</RunApiCompat>
diff --git a/src/OpenTelemetry.Exporter.Jaeger/README.md b/src/OpenTelemetry.Exporter.Jaeger/README.md
index e69929ea8..e93dbab24 100644
--- a/src/OpenTelemetry.Exporter.Jaeger/README.md
+++ b/src/OpenTelemetry.Exporter.Jaeger/README.md
@@ -14,7 +14,7 @@ the Compact Thrift API port, and as such only supports Thrift over UDP.
 This package supports all the officially supported versions of [.NET
 Core](https://dotnet.microsoft.com/download/dotnet-core).
 
-For .NET Framework, versions 4.6 and above are supported.
+For .NET Framework, versions 4.6.1 and above are supported.
 
 ## Prerequisite
 
diff --git a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj
index 205b1929d..72de9c3ee 100644
--- a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj
+++ b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj
@@ -6,7 +6,7 @@
     <MinVerTagPrefix>core-</MinVerTagPrefix>
   </PropertyGroup>
 
-  <!--Do not run ApiCopmat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
+  <!--Do not run ApiCompat for net461 as this is newly added. There is no existing contract for net461 against which we could compare the implementation.
   Remove this property once we have released a stable net461 version.-->
   <PropertyGroup Condition="'$(TargetFramework)' == 'net461'">
     <RunApiCompat>false</RunApiCompat>
diff --git a/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusMetricBuilder.cs b/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusMetricBuilder.cs
index a11c8e513..28e78e59c 100644
--- a/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusMetricBuilder.cs
+++ b/src/OpenTelemetry.Exporter.Prometheus/Implementation/PrometheusMetricBuilder.cs
@@ -19,9 +19,6 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
-#if NET452
-using OpenTelemetry.Internal;
-#endif
 
 namespace OpenTelemetry.Exporter.Prometheus.Implementation
 {