Update TypeSpec and add unbranded .NET library

.dotnet/Directory.Build.props

@@ -0,0 +1,5 @@
+<Project>
+ <PropertyGroup>
+   <LangVersion>latest</LangVersion>
+ </PropertyGroup>
+</Project>

.dotnet/OpenAI.sln

@@ -0,0 +1,50 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29709.97
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenAI", "src\OpenAI.csproj", "{28FF4005-4467-4E36-92E7-DEA27DEB1519}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenAI.Tests", "tests\OpenAI.Tests.csproj", "{1F1CD1D4-9932-4B73-99D8-C252A67D4B46}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B0C276D1-2930-4887-B29A-D1A33E7009A2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B0C276D1-2930-4887-B29A-D1A33E7009A2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B0C276D1-2930-4887-B29A-D1A33E7009A2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B0C276D1-2930-4887-B29A-D1A33E7009A2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8E9A77AC-792A-4432-8320-ACFD46730401}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8E9A77AC-792A-4432-8320-ACFD46730401}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8E9A77AC-792A-4432-8320-ACFD46730401}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8E9A77AC-792A-4432-8320-ACFD46730401}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A4241C1F-A53D-474C-9E4E-075054407E74}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A4241C1F-A53D-474C-9E4E-075054407E74}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A4241C1F-A53D-474C-9E4E-075054407E74}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A4241C1F-A53D-474C-9E4E-075054407E74}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FA8BD3F1-8616-47B6-974C-7576CDF4717E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FA8BD3F1-8616-47B6-974C-7576CDF4717E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FA8BD3F1-8616-47B6-974C-7576CDF4717E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FA8BD3F1-8616-47B6-974C-7576CDF4717E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{85677AD3-C214-42FA-AE6E-49B956CAC8DC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{85677AD3-C214-42FA-AE6E-49B956CAC8DC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{85677AD3-C214-42FA-AE6E-49B956CAC8DC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{85677AD3-C214-42FA-AE6E-49B956CAC8DC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{28FF4005-4467-4E36-92E7-DEA27DEB1519}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{28FF4005-4467-4E36-92E7-DEA27DEB1519}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{28FF4005-4467-4E36-92E7-DEA27DEB1519}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{28FF4005-4467-4E36-92E7-DEA27DEB1519}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1F1CD1D4-9932-4B73-99D8-C252A67D4B46}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1F1CD1D4-9932-4B73-99D8-C252A67D4B46}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1F1CD1D4-9932-4B73-99D8-C252A67D4B46}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1F1CD1D4-9932-4B73-99D8-C252A67D4B46}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {A97F4B90-2591-4689-B1F8-5F21FE6D6CAE}
+	EndGlobalSection
+EndGlobal

.dotnet/scripts/Add-Customizations.ps1

@@ -0,0 +1,28 @@
+function Update-SystemTextJsonPackage {
+    $current = Get-Location
+    $root = Split-Path $PSScriptRoot -Parent
+
+    # Update System.Text.Json package to 8.0.2 in OpenAI.csproj
+    $directory = Join-Path -Path $root -ChildPath "src"
+    Set-Location -Path $directory
+    dotnet remove "OpenAI.csproj" package "System.Text.Json"
+    dotnet add "OpenAI.csproj" package "System.Text.Json" --version "8.0.2"
+
+    Set-Location -Path $current
+}
+
+function Update-MicrosoftBclAsyncInterfacesPackage {
+    $current = Get-Location
+    $root = Split-Path $PSScriptRoot -Parent
+
+    # Update Microsoft.Bcl.AsyncInterfaces package to 8.0.0 in OpenAI.Tests.csproj
+    $directory = Join-Path -Path $root -ChildPath "tests"
+    Set-Location -Path $directory
+    dotnet remove "OpenAI.Tests.csproj" package "Microsoft.Bcl.AsyncInterfaces"
+    dotnet add "OpenAI.Tests.csproj" package "Microsoft.Bcl.AsyncInterfaces" --version "8.0.0"
+
+    Set-Location -Path $current
+}
+
+Update-SystemTextJsonPackage
+Update-MicrosoftBclAsyncInterfacesPackage

.dotnet/scripts/ConvertTo-Internal.ps1

@@ -0,0 +1,41 @@
+function Edit-GeneratedSources {
+    $root = Split-Path $PSScriptRoot -Parent
+
+    $directory = Join-Path -Path $root -ChildPath "src\Generated"
+    $files = Get-ChildItem -Path $($directory + "\*") -Include "*.cs" -Recurse
+
+    foreach ($file in $files) {
+        $content = Get-Content -Path $file -Raw
+
+        Write-Output "Editing $($file.FullName)"
+
+        $content = $content -creplace "public partial class", "internal partial class"
+        $content = $content -creplace "public readonly partial struct", "internal readonly partial struct"
+        $content = $content -creplace "public static partial class", "internal static partial class"
+        $content = $content -creplace "namespace OpenAI", "namespace OpenAI.Internal"
+        $content = $content -creplace "using OpenAI.Models;", "using OpenAI.Internal.Models;"
+
+        $content | Set-Content -Path $file.FullName -NoNewline
+    }
+
+    $file = Get-ChildItem -Path $directory -Filter "OpenAIClient.cs"
+    $content = Get-Content -Path $file -Raw
+
+    Write-Output "Editing $($file.FullName)"
+
+    $content = $content -creplace "private (OpenAI.)?(?<var>\w+) _cached(\w+);", "private OpenAI.Internal.`${var} _cached`${var};"
+    $content = $content -creplace "public virtual (OpenAI.)?(?<var>\w+) Get(\w+)Client", "public virtual OpenAI.Internal.`${var} Get`${var}Client"
+    $content = $content -creplace "ref _cached(\w+), new (OpenAI.)?(?<var>\w+)", "ref _cached`${var}, new OpenAI.Internal.`${var}"
+
+    $content | Set-Content -Path $file.FullName -NoNewline
+}
+
+function Remove-GeneratedTests {
+    $root = Split-Path $PSScriptRoot -Parent
+
+    $directory = Join-Path -Path $root -ChildPath "tests\Generated"
+    Remove-Item -LiteralPath $directory -Recurse -Force
+}
+
+Edit-GeneratedSources
+Remove-GeneratedTests