Enable nullable

Author: campersau

src/Docker.DotNet.BasicAuth/Docker.DotNet.BasicAuth.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.BasicAuth</PackageId>
     <Description>A Docker.DotNet extension that adds Basic Authentication for remote Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Docker.DotNet.Handler.Abstractions\Docker.DotNet.Handler.Abstractions.csproj" />
   </ItemGroup>

src/Docker.DotNet.LegacyHttp/Docker.DotNet.LegacyHttp.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.LegacyHttp</PackageId>
     <Description>A Docker.DotNet transport implementation for HTTP(S) Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <PropertyGroup>
     <BundleMicrosoftNetHttpClient>true</BundleMicrosoftNetHttpClient>
   </PropertyGroup>

src/Docker.DotNet.NPipe/Docker.DotNet.NPipe.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.NPipe</PackageId>
     <Description>A Docker.DotNet transport implementation for Windows named pipe (npipe) Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <PropertyGroup>
     <BundleMicrosoftNetHttpClient>true</BundleMicrosoftNetHttpClient>
   </PropertyGroup>

src/Docker.DotNet.NativeHttp/Docker.DotNet.NativeHttp.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.NativeHttp</PackageId>
     <Description>A Docker.DotNet transport implementation for HTTP(S) Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\Docker.DotNet.Handler.Abstractions\Docker.DotNet.Handler.Abstractions.csproj" />
   </ItemGroup>

src/Docker.DotNet.Unix/Docker.DotNet.Unix.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.Unix</PackageId>
     <Description>A Docker.DotNet transport implementation for Unix domain socket Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <PropertyGroup>
     <BundleMicrosoftNetHttpClient>true</BundleMicrosoftNetHttpClient>
   </PropertyGroup>

src/Docker.DotNet.X509/CertificateCredentials.cs

@@ -11,7 +11,7 @@ public CertificateCredentials(X509Certificate2 certificate)
 
     public bool TlsEnabled => true;
 
-    public RemoteCertificateValidationCallback ServerCertificateValidationCallback { get; set; }
+    public RemoteCertificateValidationCallback? ServerCertificateValidationCallback { get; set; }
 
     public HttpMessageHandler ConfigureHandler(HttpMessageHandler handler)
     {
@@ -35,7 +35,10 @@ public HttpMessageHandler ConfigureHandler(HttpMessageHandler handler)
                 httpHandler.ClientCertificates.Add(_certificate);
             }
 
-            httpHandler.ServerCertificateCustomValidationCallback = (message, certificate, chain, sslPolicyErrors) => ServerCertificateValidationCallback(message, certificate, chain, sslPolicyErrors);
+            if (ServerCertificateValidationCallback is { } serverCertificateValidationCallback)
+            {
+                httpHandler.ServerCertificateCustomValidationCallback = (message, certificate, chain, sslPolicyErrors) => serverCertificateValidationCallback(message, certificate, chain, sslPolicyErrors);
+            }
             return httpHandler;
         }
 #endif

src/Docker.DotNet.X509/Docker.DotNet.X509.csproj

@@ -4,6 +4,9 @@
     <PackageId>Docker.DotNet.Enhanced.X509</PackageId>
     <Description>A Docker.DotNet extension that adds X.509 client certificate authentication for remote Docker Engine connections.</Description>
   </PropertyGroup>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
   <PropertyGroup>
     <BundleMicrosoftNetHttpClient>true</BundleMicrosoftNetHttpClient>
   </PropertyGroup>

src/Docker.DotNet/Models/ObjectExtensionData.cs

@@ -3,5 +3,5 @@ namespace Docker.DotNet.Models;
 public class ObjectExtensionData
 {
     [JsonExtensionData]
-    public IDictionary<string, object> ExtensionData { get; set; }
+    public IDictionary<string, object>? ExtensionData { get; set; }
 }

src/Docker.DotNet/QueryString.cs

@@ -109,7 +109,7 @@ private Tuple<PropertyInfo, TAttribType>[] FindAttributedPublicProperties<TValue
             new Tuple<PropertyInfo, TAttribType>(pi, pi.GetCustomAttribute<TAttribType>())).ToArray();
     }
 
-    private static bool IsDefaultOfType(object o)
+    private static bool IsDefaultOfType(object? o)
     {
         if (o is ValueType)
         {

src/Microsoft.Net.Http.Client/BufferedReadStream.cs

@@ -4,7 +4,7 @@ internal sealed class BufferedReadStream : WriteClosableStream, IPeekableStream
 {
     private readonly Stream _inner;
 
-    private readonly Socket _socket;
+    private readonly Socket? _socket;
 
     private readonly byte[] _buffer;
 
@@ -16,14 +16,14 @@ internal sealed class BufferedReadStream : WriteClosableStream, IPeekableStream
 
     private int _bufferCount;
 
-    private MemoryStream _readLineBuffer;
+    private MemoryStream? _readLineBuffer;
 
-    public BufferedReadStream(Stream inner, Socket socket, ILogger logger)
+    public BufferedReadStream(Stream inner, Socket? socket, ILogger logger)
         : this(inner, socket, 8192, logger)
     {
     }
 
-    public BufferedReadStream(Stream inner, Socket socket, int bufferLength, ILogger logger)
+    public BufferedReadStream(Stream inner, Socket? socket, int bufferLength, ILogger logger)
     {
         _inner = inner ?? throw new ArgumentNullException(nameof(inner));
         _socket = socket;
@@ -146,7 +146,7 @@ public bool Peek(byte[] buffer, uint toPeek, out uint peeked, out uint available
         throw new NotSupportedException("_inner stream isn't a peekable stream");
     }
 
-    public async Task<string> ReadLineAsync(CancellationToken cancellationToken)
+    public async Task<string?> ReadLineAsync(CancellationToken cancellationToken)
     {
         if (_readLineBuffer == null)
         {