Cleanup

StackExchange.Redis.Tests/Helpers/TextWriterOutputHelper.cs

@@ -12,11 +12,11 @@ public class TextWriterOutputHelper : TextWriter
         private readonly ITestOutputHelper Output;
         public TextWriterOutputHelper(ITestOutputHelper outputHelper) => Output = outputHelper;
 
-        public override void WriteLine(string message)
+        public override void WriteLine(string value)
         {
             base.Write(DateTime.UtcNow.ToString("HH:mm:ss.fff"));
             base.Write(": ");
-            base.WriteLine(message);
+            base.WriteLine(value);
         }
 
         public override void Write(char value)

StackExchange.Redis.Tests/Sentinel.cs

-using System;
-using System.IO;
+using System.IO;
 using System.Net;
 using System.Threading;
-using StackExchange.Redis.Tests.Helpers;
 using Xunit;
 using Xunit.Abstractions;
 

StackExchange.Redis/StackExchange/Redis/PlatformHelper.cs

@@ -2,9 +2,10 @@
 
 namespace StackExchange.Redis
 {
-    internal class PlatformHelper
+    internal static class PlatformHelper
     {
         public static bool IsMono { get; } = Type.GetType("Mono.Runtime") != null;
+
         public static bool IsUnix { get; } = (int)Environment.OSVersion.Platform == 4
                                           || (int)Environment.OSVersion.Platform == 6
                                           || (int)Environment.OSVersion.Platform == 128;