Net9

Composite Recipes

Recipes that include further recipes, often including the individual recipes below.

• Migrate Swashbuckle to built-in OpenAPI
• Migrate to .NET 9

Recipes

• Find AuthenticationManager usage (SYSLIB0009)
• Find BinaryFormatter usage (removed in .NET 9)
• Find BinaryReader.ReadString behavior change
• Find EnumConverter constructor validation change
• Find HttpClientHandler usage (HttpClientFactory default change)
• Find HttpListenerRequest.UserAgent nullable change
• Find IDistributedCache usage (HybridCache in .NET 9)
• Find InMemoryDirectoryInfo rootDir prepend change
• Find IncrementingPollingCounter async callback change
• Find JsonSerializer.Deserialize nullable JsonDocument change
• Find RuntimeHelpers.GetSubArray return type change
• Find SafeEvpPKeyHandle.DuplicateHandle up-ref change
• Find ServicePointManager usage (SYSLIB0014)
• Find Swashbuckle usage (ASP.NET Core 9 built-in OpenAPI)
• Find ZipArchive.CreateEntry with CompressionLevel (bit flag change)
• Find ZipArchiveEntry name/comment UTF-8 encoding change
• Find implicit authentication default scheme (ASP.NET Core 9)
• Find non-generic JsonStringEnumConverter
• Find obsolete X509Certificate2/X509Certificate constructors (SYSLIB0057)
• Find synchronous ExecuteUpdate/ExecuteDelete (EF Core 9)
• Remove ConfigureAwait(false)
• Use Frozen collections instead of Immutable
• Use Guid.CreateVersion7()
• Use LINQ AggregateBy()
• Use LINQ CountBy()
• Use LINQ Index()
• Use MapStaticAssets()
• Use System.Threading.Lock for lock fields
• Use Task.CompletedTask
• Use Volatile.Read/Write (SYSLIB0054)
• Use X509CertificateLoader (SYSLIB0057)
• Use \e escape sequence