Applied cleanup for IDE0090 to the solution.

Author: MiYanni

src/BuiltInTools/BrowserRefresh/BrowserRefreshMiddleware.cs

@@ -11,7 +11,7 @@ namespace Microsoft.AspNetCore.Watch.BrowserRefresh
 {
     public class BrowserRefreshMiddleware
     {
-        private static readonly MediaTypeHeaderValue _textHtmlMediaType = new MediaTypeHeaderValue("text/html");
+        private static readonly MediaTypeHeaderValue _textHtmlMediaType = new("text/html");
         private readonly RequestDelegate _next;
         private readonly ILogger _logger;
 

src/BuiltInTools/BrowserRefresh/ResponseStreamWrapper.cs

@@ -15,7 +15,7 @@ namespace Microsoft.AspNetCore.Watch.BrowserRefresh
     /// </summary>
     public class ResponseStreamWrapper : Stream
     {
-        private static readonly MediaTypeHeaderValue _textHtmlMediaType = new MediaTypeHeaderValue("text/html");
+        private static readonly MediaTypeHeaderValue _textHtmlMediaType = new("text/html");
         private readonly Stream _baseStream;
         private readonly HttpContext _context;
         private readonly ILogger _logger;

src/BuiltInTools/dotnet-watch/Filters/LaunchBrowserFilter.cs

@@ -10,7 +10,7 @@ namespace Microsoft.DotNet.Watcher.Tools
 {
     internal sealed class LaunchBrowserFilter : IWatchFilter, IAsyncDisposable
     {
-        private static readonly Regex NowListeningRegex = new Regex(@"Now listening on: (?<url>.*)\s*$", RegexOptions.None | RegexOptions.Compiled, TimeSpan.FromSeconds(10));
+        private static readonly Regex NowListeningRegex = new(@"Now listening on: (?<url>.*)\s*$", RegexOptions.None | RegexOptions.Compiled, TimeSpan.FromSeconds(10));
         private readonly DotNetWatchOptions _options;
         private readonly string? _browserPath;
         private bool _attemptedBrowserLaunch;

src/BuiltInTools/dotnet-watch/HotReload/HotReloadEventSource.cs

@@ -28,6 +28,6 @@ internal sealed class Keywords
         [Event(2, Message = "Hot reload finished for {0}", Level = EventLevel.Informational, Keywords = Keywords.Perf)]
         public void HotReloadEnd(StartType handlerType) { WriteEvent(2, handlerType); }
 
-        public static readonly HotReloadEventSource Log = new HotReloadEventSource();
+        public static readonly HotReloadEventSource Log = new();
     }
 }

src/BuiltInTools/dotnet-watch/Internal/ConsoleReporter.cs

@@ -12,7 +12,7 @@ namespace Microsoft.Extensions.Tools.Internal
     /// </summary>
     internal sealed class ConsoleReporter : IReporter
     {
-        private readonly object _writeLock = new object();
+        private readonly object _writeLock = new();
 
         public ConsoleReporter(IConsole console)
             : this(console, verbose: false, quiet: false, suppressEmojis: false)

src/BuiltInTools/dotnet-watch/Internal/ConsoleRequester.cs

@@ -12,7 +12,7 @@ namespace Microsoft.Extensions.Tools.Internal
     /// </summary>
     internal sealed class ConsoleRequester : IRequester
     {
-        private readonly object _writeLock = new object();
+        private readonly object _writeLock = new();
 
         public ConsoleRequester(IConsole console, bool quiet, bool suppressEmojis)
         {

src/BuiltInTools/dotnet-watch/Internal/FileWatcher/DotnetFileWatcher.cs

@@ -16,7 +16,7 @@ internal class DotnetFileWatcher : IFileSystemWatcher
 
         private FileSystemWatcher _fileSystemWatcher;
 
-        private readonly object _createLock = new object();
+        private readonly object _createLock = new();
 
         public DotnetFileWatcher(string watchedDirectory)
             : this(watchedDirectory, DefaultWatcherFactory)

src/BuiltInTools/dotnet-watch/Internal/FileWatcher/PollingFileWatcher.cs

@@ -15,9 +15,9 @@ internal class PollingFileWatcher : IFileSystemWatcher
 
         private readonly DirectoryInfo _watchedDirectory;
 
-        private Dictionary<string, FileMeta> _knownEntities = new Dictionary<string, FileMeta>();
-        private Dictionary<string, FileMeta> _tempDictionary = new Dictionary<string, FileMeta>();
-        private HashSet<string> _changes = new HashSet<string>();
+        private Dictionary<string, FileMeta> _knownEntities = new();
+        private Dictionary<string, FileMeta> _tempDictionary = new();
+        private HashSet<string> _changes = new();
 
         private Thread _pollingThread;
         private bool _raiseEvents;

src/BuiltInTools/dotnet-watch/Internal/OutputCapture.cs

@@ -8,7 +8,7 @@ namespace Microsoft.DotNet.Watcher.Internal
 {
     internal sealed class OutputCapture
     {
-        private readonly List<string> _lines = new List<string>();
+        private readonly List<string> _lines = new();
         public IEnumerable<string> Lines => _lines;
         public void AddLine(string line) => _lines.Add(line);
     }

src/BuiltInTools/dotnet-watch/Internal/ProcessRunner.cs

@@ -165,7 +165,7 @@ private class ProcessState : IDisposable
         {
             private readonly IReporter _reporter;
             private readonly Process _process;
-            private readonly TaskCompletionSource _tcs = new TaskCompletionSource();
+            private readonly TaskCompletionSource _tcs = new();
             private volatile bool _disposed;
 
             public ProcessState(Process process, IReporter reporter)