diff --git a/src/MediatR/MicrosoftExtensionsDI/MediatrServiceConfiguration.cs b/src/MediatR/MicrosoftExtensionsDI/MediatrServiceConfiguration.cs
index 5a3ea716..bcc7be0b 100644
--- a/src/MediatR/MicrosoftExtensionsDI/MediatrServiceConfiguration.cs
+++ b/src/MediatR/MicrosoftExtensionsDI/MediatrServiceConfiguration.cs
@@ -15,7 +15,7 @@ public class MediatRServiceConfiguration
     /// <summary>
     /// Optional filter for types to register. Default value is a function returning true.
     /// </summary>
-    public Func<Type, bool> TypeEvaluator { get; set; } = t => true;
+    public Func<Type, bool> TypeEvaluator { get; set; } = _ => true;
     
     /// <summary>
     /// Mediator implementation type to register. Default is <see cref="Mediator"/>
diff --git a/src/MediatR/MicrosoftExtensionsDI/ServiceCollectionExtensions.cs b/src/MediatR/MicrosoftExtensionsDI/ServiceCollectionExtensions.cs
index 5926f8fd..c9417218 100644
--- a/src/MediatR/MicrosoftExtensionsDI/ServiceCollectionExtensions.cs
+++ b/src/MediatR/MicrosoftExtensionsDI/ServiceCollectionExtensions.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Linq;
 using MediatR;
 using MediatR.Internal;
 using MediatR.Pipeline;
diff --git a/src/MediatR/Registration/ServiceRegistrar.cs b/src/MediatR/Registration/ServiceRegistrar.cs
index 2cfdc88c..c756c47f 100644
--- a/src/MediatR/Registration/ServiceRegistrar.cs
+++ b/src/MediatR/Registration/ServiceRegistrar.cs
@@ -141,7 +141,7 @@ private static void AddConcretionsThatCouldBeClosed(Type @interface, List<Type>
         }
     }
 
-    internal static bool CouldCloseTo(this Type openConcretion, Type closedInterface)
+    private static bool CouldCloseTo(this Type openConcretion, Type closedInterface)
     {
         var openInterface = closedInterface.GetGenericTypeDefinition();
         var arguments = closedInterface.GenericTypeArguments;