Sync shared code from runtime (#23430)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

src/Shared/runtime/Quic/Implementations/Mock/MockConnection.cs

@@ -14,13 +14,13 @@ namespace System.Net.Quic.Implementations.Mock
     internal sealed class MockConnection : QuicConnectionProvider
     {
         private readonly bool _isClient;
-        private bool _disposed = false;
+        private bool _disposed;
         private IPEndPoint? _remoteEndPoint;
         private IPEndPoint? _localEndPoint;
         private object _syncObject = new object();
-        private Socket? _socket = null;
-        private IPEndPoint? _peerListenEndPoint = null;
-        private TcpListener? _inboundListener = null;
+        private Socket? _socket;
+        private IPEndPoint? _peerListenEndPoint;
+        private TcpListener? _inboundListener;
         private long _nextOutboundBidirectionalStream;
         private long _nextOutboundUnidirectionalStream;
 

src/Shared/runtime/Quic/Implementations/Mock/MockListener.cs

@@ -13,7 +13,7 @@ namespace System.Net.Quic.Implementations.Mock
 {
     internal sealed class MockListener : QuicListenerProvider
     {
-        private bool _disposed = false;
+        private bool _disposed;
         private SslServerAuthenticationOptions? _sslOptions;
         private IPEndPoint _listenEndPoint;
         private TcpListener _tcpListener;

src/Shared/runtime/Quic/Implementations/Mock/MockStream.cs

@@ -13,14 +13,14 @@ namespace System.Net.Quic.Implementations.Mock
 {
     internal sealed class MockStream : QuicStreamProvider
     {
-        private bool _disposed = false;
+        private bool _disposed;
         private readonly long _streamId;
         private bool _canRead;
         private bool _canWrite;
 
         private MockConnection? _connection;
 
-        private Socket? _socket = null;
+        private Socket? _socket;
 
         // Constructor for outbound streams
         internal MockStream(MockConnection connection, long streamId, bool bidirectional)

src/Shared/runtime/Quic/Implementations/MsQuic/Internal/MsQuicSession.cs

@@ -6,7 +6,7 @@ namespace System.Net.Quic.Implementations.MsQuic.Internal
 {
     internal sealed class MsQuicSession : IDisposable
     {
-        private bool _disposed = false;
+        private bool _disposed;
         private IntPtr _nativeObjPtr;
         private bool _opened;
 

src/Shared/runtime/Quic/Implementations/MsQuic/MsQuicStream.cs

@@ -61,7 +61,7 @@ namespace System.Net.Quic.Implementations.MsQuic
         // Used by the class to indicate that the stream is writable.
         private readonly bool _canWrite;
 
-        private volatile bool _disposed = false;
+        private volatile bool _disposed;
 
         private List<QuicBuffer> _receiveQuicBuffers = new List<QuicBuffer>();