Handle compiler warnings.

ConsoleInterface/Program.cs

@@ -1,6 +1,6 @@
-using System.IO;
+using System.Collections.Generic;
+using System.IO;
 using CommandLine;
-using Image;
 using Image.Files;
 using Image.Output;
 using Microsoft.Extensions.Logging;
@@ -20,7 +20,8 @@ namespace ConsoleInterface
         ///     The console interface for the project and the main entrypoint.
         /// </summary>
         /// <param name="args">Command line provided args.</param>
-        private static void Main(string[] args)
+        // ReSharper disable once UnusedMember.Local
+        private static void Main(IEnumerable<string> args)
         {
             Parser.Default.ParseArguments<Options>(args).WithParsed(RunOptions);
         }

ConsoleInterface/TaskExecutor.cs

@@ -91,7 +91,7 @@ namespace ConsoleInterface
             result.Wait();
 
             var successTasks = tasks.Count(t => t.IsCompletedSuccessfully && t.Result);
-            var errorTasks = tasks.Count() - successTasks;
+            var errorTasks = tasks.Count - successTasks;
             Logger.LogInformation($"All tasks completed. Success: {successTasks}, Errors: {errorTasks}");
         }
     }

ImageCore.Tests/TestCompressor.cs

@@ -1,6 +1,5 @@
 using System;
 using System.IO;
-using Image;
 using Image.Compressor;
 using Xunit;
 

ImageCore.Tests/TestLocalSystemFilesRetriever.cs

@@ -2,7 +2,6 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using Image;
 using Image.Files;
 using Xunit;
 

ImageCore/Compressor/LosslessCompressor.cs

@@ -7,7 +7,7 @@ namespace Image.Compressor
     /// </summary>
     public class LosslessCompressor : ICompressor
     {
-        public static readonly LosslessCompressor Instance;
+        public static readonly LosslessCompressor Instance = new LosslessCompressor();
         private readonly ImageOptimizer _imageOptimizer;
 
         public LosslessCompressor()

ImageCore/Compressor/NullCompressor.cs

@@ -5,7 +5,7 @@
     /// </summary>
     public class NullCompressor : ICompressor
     {
-        public static readonly NullCompressor Instance;
+        public static readonly NullCompressor Instance = new NullCompressor();
 
         /// <summary>
         ///     <inheritdoc />

ImageCore/ImageCore.csproj

@@ -3,6 +3,7 @@
     <PropertyGroup>
         <RootNamespace>Image</RootNamespace>
         <TargetFrameworks>net5.0;netstandard2.1</TargetFrameworks>
+        <LangVersion>8.0</LangVersion>
     </PropertyGroup>
 
     <ItemGroup>

ImageCore/Output/KeepFilenameFormatter.cs

@@ -36,7 +36,7 @@ namespace Image.Output
         {
             Logger.LogDebug($"KeepFilenameFormatter - {_outputDirectory} - {initialFilePath}");
             Guard.Against.NullOrEmpty(initialFilePath, nameof(initialFilePath));
-            var fileName = Path.GetFileName(initialFilePath)?.Split('.')[0];
+            var fileName = Path.GetFileName(initialFilePath).Split('.')[0];
             var path = Path.Combine(_outputDirectory, $"{fileName}.jpg");
 
             return path;