Get clean on warnings

More meaningful warnings were being obscured by 1334 warnings being triggered during build. This gets it to 0 and sets TreatWarningsAsErrors. Most of getting to 0 was just via broad suppression.

src/Custom/Assistants/Internal/GeneratorStubs.Internal.cs

@@ -34,10 +34,10 @@ internal partial class MessageDeltaContentImageUrlObjectImageUrl
 }
 
 [CodeGenModel("MessageDeltaContentImageFileObject")]
-internal partial class MessageDeltaContentImageFileObject { private readonly string Type; }
+internal partial class MessageDeltaContentImageFileObject { private readonly new string Type; }
 
 [CodeGenModel("MessageDeltaContentImageUrlObject")]
-internal partial class MessageDeltaContentImageUrlObject { private readonly string Type; }
+internal partial class MessageDeltaContentImageUrlObject { private readonly new string Type; }
 
 [CodeGenModel("MessageDeltaObjectDelta")]
 internal partial class MessageDeltaObjectDelta

src/Custom/Audio/TranscribedSegment.cs

@@ -1,8 +1,10 @@
 using System.Collections.Generic;
+using System.Runtime.InteropServices;
 
 namespace OpenAI.Audio;
 
 [CodeGenModel("TranscriptionSegment")]
+[StructLayout(LayoutKind.Auto)]
 public readonly partial struct TranscribedSegment
 {
     // CUSTOM: Rename.

src/Custom/Chat/ChatMessageContentPart.cs

@@ -11,9 +11,9 @@ namespace OpenAI.Chat;
 public partial class ChatMessageContentPart
 {
     private readonly ChatMessageContentPartKind _kind;
-    private readonly string _text = default;
-    private readonly InternalChatCompletionRequestMessageContentPartImageImageUrl _imageUrl = default;
-    private readonly string _dataUri = default;
+    private readonly string _text;
+    private readonly InternalChatCompletionRequestMessageContentPartImageImageUrl _imageUrl;
+    private readonly string _dataUri;
 
     internal ChatMessageContentPart(string text)
     {

src/OpenAI.csproj

@@ -28,14 +28,22 @@
 
     <!-- Embed source files that are not tracked by the source control manager in the PDB -->
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
-</PropertyGroup>
 
-  <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
-    <!-- Normalize stored file paths in symbols when in a CI build. -->
-    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
     <!-- Disable missing XML documentation warnings -->
     <NoWarn>$(NoWarn),1570,1573,1574,1591</NoWarn>
+
+    <!-- Disable obsolete warnings -->
+    <NoWarn>$(NoWarn),0618</NoWarn>
+
+    <!-- Disable unused fields warnings -->
+    <NoWarn>$(NoWarn),0169</NoWarn>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
+    <!-- Normalize stored file paths in symbols when in a CI build. -->
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
   </PropertyGroup>
 
   <ItemGroup>

src/Utility/CustomSerializationHelpers.cs

@@ -1,6 +1,7 @@
+#nullable enable
+
 using System;
 using System.ClientModel.Primitives;
-using System.Collections;
 using System.Collections.Generic;
 using System.Text.Json;
 

src/Utility/Polyfill/System.Diagnostics.CodeAnalysis.ExperimentalAttribute.cs

@@ -1,4 +1,5 @@
 #if !NET8_0_OR_GREATER
+#nullable enable
 
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.