Oleg Kyrylchuk ✙ 🇺🇦 @okyrylchuk Twitter profile | Pikagi

Pikagi

Oleg Kyrylchuk ✙ 🇺🇦

@okyrylchuk

14,831

Followers

680

Following

712

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5,895

Statuses

I write about @dotnet | Microsoft MVP | .NET Foundation member | .NET Enthusiast Help for Ukraine or

https://t.co/luoW7ENNvN

Joined July 2009

Don't wanna be here? Send us removal request.

Pinned Tweet

@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

6 months

I'm thrilled to announce, that this year I'm starting a newsletter about .NET 🥳 The first issue about C# 12 features is coming tomorrow on Friday Feel free to subscribe if you want to get weekly news about .NET See you tomorrow in your inbox☺️

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

I'm a Ukrainian living in Poland for 12 years. But many of my relatives and friends are in Ukraine. I see how many people try to justify russia's aggression. If you do it for ANY reason, unfollow me. I wish you never call your parents and discuss what to do because of war.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

There is a new hot topic in .NET!! What's your favorite version of code? 😏 I like v3 😬

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces two long-awaited types - DateOnly and TimeOnly. They represent the date or time portion of a DateTime. Have you been waiting for them? 🤓 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

All my tweets about C# 10 features in one thread. 🧵 Retweets are appreciated 😊 #dotnet #csharp #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces the new Enumerable.*By methods. A 'keySelector' is provided to compare elements by. New methods: • MinBy • MaxBy • DistinctBy • ExceptBy • IntersectBy • UnionBy IMHO, these new methods are super helpful 🤌 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, Parallel.ForEachAsync has been finally added 🥳 It allows you to control the degree of parallelism for scheduled asynchronous work. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 introduces a new `required` modifier to properties and fields to enforce constructors and callers to initialize those values. A new `SetsRequiredMembers` attribute on the constructor informs the compiler that it initializes all required members.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

Nice small improvement for ArgumentNullException in .NET 6. No need to check for null in every method before throwing an exception. Now it is a one-liner. 🙌 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A big thread of new APIs in the .NET 6. 🧵 Retweets are appreciated ☺️ #dotnet6 #coding #devcommunity #programming

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, you can override the default value for '*OrDefault' LINQ methods if no element is found. Improved methods: • SingleOrDefault • FirstOrDefault • LastOrDefault A pretty handy feature, isn't it? 🙂 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

Meet a new data structure in .NET 6 🙌 PriorityQueue represents a min priority queue. Each element is enqueued with an associated priority that determines the dequeue order. The elements with the lowest priority get dequeued first. #dotnet6 #coding #devcommunity

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

It was impossible to set a more specific return type in method override in a derived class in C#. C# 9 makes it possible with covariant returns. #csharp #dotnet #csharp9 #dotnetcore

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A thread about LINQ improvements in .NET 6 🧵 As always, retweets are appreciated 😌 #dotnet6 #linq #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

EF Core 6.0 new features. 48 code samples. The biggest thread of mine so far. With sub-threads. The last this year. It took me almost two months to go through many new features in EF Core 6. Retweets are appreciated 😊 #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

Hi folks! I've published a lot of my latest code samples from my tweets about .NET 6 on GitHub. You can find samples for: • C# 10 features • LINQ features • System.Text.Json features • New APIs #dotnet6 #csharp10 #json #linq #devcommunity

GitHub - okyrylchuk/dotnet6_features

Contribute to okyrylchuk/dotnet6_features development by creating an account on GitHub.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A thread of System.Text.Json features in the .NET 6. 🧵 Retweets are appreciated ☺️ #dotnet6 #coding #devcommunity #json #programming

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

If you need to split elements of a sequence into chunks, you don't have to implement it on your own anymore in .NET 6. Meet a new IEnumerable extension method, 'Chunk' 🙌 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

Please, go out on protests in your cities! Demand from your governments to help Ukraine! Ukraine is strong, but we need help! #UkraineUnderAttack

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

EF 7 introduces a bulk update and deletion. Restrictions: • EF doesn't track bulk changes. • Any tracked entities will not be kept in sync. • Additional commands may need to be sent in the correct order so as not to violate database constraints. Finally 🎉

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 introduces a new access modifier 𝗳𝗶𝗹𝗲. The visibility of created type is scoped to the source file in which it is declared. This feature helps source generator authors avoid naming collisions.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

1 year

Redis for .NET Developers! A complete Redis development course for the .NET programmer. Starts today.

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RU102N: Redis for .NET developers

Learn how to build extremely fast apps in the .NET ecosystem using Redis.

university.redis.com

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces a new low-level API for reading and writing files without a FileStream. A new type, RandomAccess, provides offset-based APIs for reading and writing files in a thread-safe manner. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces a new fully async 'PeriodicTimer'. It's enables waiting asynchronously for timer ticks. It has one method, 'WaitForNextTickAsync', which waits for the next tick of the timer or for the timer to be stopped. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In C#, if you want to pass the type to an attribute, you can use the 'typeof' expression. However, there is no way to constrain what types are allowed to be passed. C# 10 allows generic attributes🙂 The feature is still in preview. #dotnet #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 preview introduces raw string literals. It allows containing of arbitrary text without escaping. The format is at least three double quotes """..""" Combining with string interpolation, the count of $ denotes how many consecutive braces start and end the interpolation.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

The 'Range' struct has been introduced in the .NET Core 3.0. It is used by the C# compiler to support a range operator '..' In .NET 6, the 'Take' method from IEnumerable<T> supports the 'Range'. Now you can skip the 'Skip' method 😉 #dotnet6 #coding #devcommunity #linq

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

.NET 7 introduces new structs Int128 and UInt128. They represent 128 signed and 128 unsigned integers respectively.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET Core 3.0 has introduced the 'Index' struct, which is used by the C# compiler to support a new unary prefix "hat" operator (^). It means index "from the end" of collection. In .NET 6, 'ElementAt' method from IEnumerable<T> supports the Index. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

All my tweets about C# 11 features in one thread 🧵 Twelve features! Which one is your favorite? I'm waiting for the required members 🔥 Retweets are appreciated 😊

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

I've converted another of my Twitter threads to a blog article. LINQ improvements in .NET 6 #dotnet6 #linq #devcommunity

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New LINQ improvements in .NET 6

Take a look at new LINQ improvements in .NET 6

blog.okyrylchuk.dev

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, you can enable validation of NuGet packages. It validates if: • there are no breaking changes across versions • the package has the same set of public APIs for all runtime-specific implementations It also determines any target-framework gaps #dotnet6 #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

10 months

C# 12 introduces collection expressions. It's a new terse syntax to initialize collections. It works with arrays, Span<T>, and types that support collection initializers. A new spread operator .. allows inlining other collections into a collection expression.

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Oleg Kyrylchuk ✙ 🇺🇦

2 years

.NET is developing too fast.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 has an implementation of the OpenTelemetry Metrics API specification. A 'Meter' class creates instrument objects. There are instrument classes: • Counter • Histogram • ObservableCounter • ObservableGauge You can even listen to the meter. #dotnet6 #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

.NET 6 includes preview support for HTTP/3 (not Web3). HTTP/3 uses a new connection protocol QUIC. /1 #dotnet6 #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 SDK introduces a new command. dotnet sdk check It shows you if there is a new version available for any of the .NET SDKs, runtimes, or workloads you have installed. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

EF Core 6.0 gets its own minimal APIs. New extension methods register a DbContext type and supply a database provider's configuration in a single line. #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

Happy Birthday, .NET! 🥳🎉🍾

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 introduces static abstract members in interfaces. You can add static abstract members in interfaces to define interfaces that include overloadable operators, other static members, and static properties. It's one of the features to enable generic math support. 1/2

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

EF Core supports querying via stored procedures. EF 7 introduces support for mappings for 𝗶𝗻𝘀𝗲𝗿𝘁𝘀, 𝘂𝗽𝗱𝗮𝘁𝗲𝘀, and 𝗱𝗲𝗹𝗲𝘁𝗲𝘀 to SP. An example below shows how to map insert SP for a 𝗧𝗮𝗴 entity type. Insert of 𝗧𝗮𝗴 will execute 𝗧𝗮𝗴𝘀_𝗜𝗻𝘀𝗲𝗿𝘁 SP.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, System.Text.Json exposes notifications for (de)serialization. There are four new interfaces to implement according to your needs: • IJsonOnDeserialized • IJsonOnDeserializing • IJsonOnSerialized • IJsonOnSerializing #dotnet6 #json #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces implicit namespace support for C# projects. Namespaces are implicitly included by utilizing the 'global using' feature introduced in C# 10. Since RC1 the option is enabled by default. #dotnet #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 5 new HttpClient extension methods have been added. Now you can easily GET data from JSON and POST data as JSON. HttpContent also got new extension methods to read and then parse from JSON. #dotnet #programming #DEVCommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A few improvements in EF Core 6.0 🤯😂

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Oleg Kyrylchuk ✙ 🇺🇦

1 year

𝗘𝗙 7 introduces entity splitting. It maps a single entity type to multiple tables. The example below shows how a single 𝗣𝗲𝗿𝘀𝗼𝗻 entity maps to three separate tables - 𝗣𝗲𝗼𝗽𝗹𝗲, 𝗣𝗵𝗼𝗻𝗲𝗡𝘂𝗺𝗯𝗲𝗿𝘀, and 𝗔𝗱𝗱𝗿𝗲𝘀𝘀𝗲𝘀.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

LINQ query enhancements in EF Core 6.0 thread. 12 features with code samples. Retweets are appreciated 😊 #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

.NET 7 introduces new type converters for the newly added primitive types as: • DateOnly • TimeOnly • Half • Int128 • UInt128

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, you can easier wait for the task to complete execution asynchronously. The 'TimeoutException' is thrown when the timeout of operation expires. ⚠️ This is for un-cancellable operations! #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

In .NET, there are LINQ methods 𝘖𝘳𝘥𝘦𝘳𝘉𝘺 and 𝘖𝘳𝘥𝘦𝘳𝘉𝘺𝘋𝘦𝘴𝘤𝘦𝘯𝘥𝘪𝘯𝘨 to sort sequence elements according to a key. .NET 7 introduces new methods 𝘖𝘳𝘥𝘦𝘳 and 𝘖𝘳𝘥𝘦𝘳𝘋𝘦𝘴𝘤𝘦𝘯𝘥𝘪𝘯𝘨 to sort sequence elements using the default comparer.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

EF 7 introduces a new 𝗜𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻𝗜𝗻𝘁𝗲𝗿𝗰𝗲𝗽𝘁𝗼𝗿 that intercepts object creation and initialization by EF, typically when data is returned by a query. In the example below, the interceptor sets the time when an entity is retrieved from the database.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

My first blog post this year! 🥳 Seven System.Text.Json features in the .NET 6. #dotnet6 #json #devcommunity

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System.Text.Json features in .NET 6

Overview of seven System.Text.Json features in .NET 6.

blog.okyrylchuk.dev

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

I'm on Scott's blog. Now I can retire 😀 Thank you, @shanselman , for recommendation to follow me 💚

Parallel.ForEachAsync in .NET 6

Great tweet from Oleg Kyrylchuk (follow him!) showing how cool ...

www.hanselman.com

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 preview introduces list patterns. It extends pattern matching to match sequences of elements in an array or a list. You can use list patterns with any pattern, including constant, type, property, and relational patterns. Bonus example in the reply 👇

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

New .NET is a cross-platform. You can run your app across different platforms. However, using platform-specific APIs means you have to be careful with it. There are new APIs and platform compatibility analyzer to deal with cross-platform issues. 🧵 1/6 #dotnet #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

GitHub Copilot is now available from Visual Studio 2022 for everyone in the technical preview. I got access to Copilot for VS Code several months ago. I didn't play too much with it, but I was impressed with what it could do. I'm curious how it'll work in Visual Studio.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

4 months

.NET 6 introduced a new fully async PeriodicTimer. It enables waiting asynchronously for timer ticks. It has one method, WaitForNextTickAsync, which waits for the next tick of the timer or for the timer to be stopped.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

I've been awarded Microsoft MVP in Developer Technologies. I'm grateful, but I can't rejoice it due the war in Ukraine with russia. I suspended my community work since Feb 24th. I hope I'll be able to be back soon when Ukraine wins. Stay safe and support Ukraine 🇺🇦

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

Entity Framework Core 5.0 introduces new entity mappings. You can map an entity to: • a SQL query • a table-valued function • a view Example below. #dotnet #EFCore #EntityFramework #coding

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Oleg Kyrylchuk ✙ 🇺🇦

2 years

C# 11 preview introduces newlines in string interpolation. It allows any valid C# code between { }, including newlines, to improve readability. It's helpful when you want to use longer C# expressions in interpolation, like pattern matching switch expressions or LINQ queries.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

Starting with EF Core 2.2, you could add a tag to your query for better debug purposes. EF Core 6.0 went further, and now you can tag queries with the filename and line number of the LINQ code. Pretty cool, huh? 😎 #dotnet6 #efcore6 #coding #devcommunity

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2 years

🙃

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@okyrylchuk

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3 years

.NET 6 introduces a new API to allocate native memory. A new NativeMemory type has methods for allocation and freeing memory. What do you think about the feature? 🧐 #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

10 months

.NET 8 introduces a new TimeProvider abstraction. It allows time mocking in the test scenarios. It is supported by other features that rely on time, for example, Task.Delay. Also, a netstandard 2.0 library Microsoft.Bcl.TimeProvider has been created with this provider.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

Starting from C# 10, you can reference nested properties or fields within a proper pattern. The property pattern becomes more readable and requires fewer curly brackets 🙂 What do you think about the feature? #dotnet #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

With .NET 6, you can now search NuGet .org for new templates. dotnet new --search For installed templates, you can check updates via --update-check and apply them via --update--apply. #dotnet6 #cli #devcommunity

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3 years

EF Core 6.0 supports SQL Server temporal tables. A table can be configured as a temporal table with the SQL Server defaults for the timestamps and history table. 1/2 👇 #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

Another small improvement in .NET 6. You can access a process path without allocation a new Process instance. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 months

.NET 6 introduced a new low-level API for reading and writing files without a FileStream. A new type, RandomAccess, provides offset-based APIs for reading and writing files in a thread-safe manner.

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Oleg Kyrylchuk ✙ 🇺🇦

2 years

By default, EF Core maps aggregate types to the same table as the owning entity type. Each property is mapped to a column. Also, you can map aggregate to its own table. In EF 7, you can map aggregate to a JSON column.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

EF Core supports splitting a single LINQ query into multiple SQL queries. EF Core 6.0 can split a LINQ query where non-navigation collections are contained in the query projection. #dotnet6 #efcore6 #coding #devcommunity

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Oleg Kyrylchuk ✙ 🇺🇦

4 months

.NET 6 introduced a new data structure. PriorityQueue implements an array-backed, quaternary min-heap. Each element is enqueued with an associated priority that determines the dequeue order. The elements with the lowest priority get dequeued first.

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Oleg Kyrylchuk ✙ 🇺🇦

2 years

Last year I tweeted about generic attributes, which were supposed to be in C# 10. However, the release was postponed to C# 11. So I enhanced my old graphic 🙂 C# 11 introduces the generic attributes.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

C# 10 introduces a new way of namespace declarations - file scoped namespaces. However, you cannot declare a nested namespace or a second file-scoped namespace in the same file. C# continue to rid of curly brackets {😀} #dotnet #programming #devcommunity

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1 year

You're offered $1 million, but you can never use .NET again. Do you accept?

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1 year

C# 12 introduces the using directives for additional types. You can now alias almost any type. It's beneficial for tuples because you can name tuple elements.

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Oleg Kyrylchuk ✙ 🇺🇦

3 years

Recently I've booked a slot in .NET Advent Calendar. The problem is I didn't have a blog 😬 So I've created one powered by @hashnode ✍️ I am thrilled to announce my first blog post about new APIs in .NET 6🥳 #dotnet6 #devcommunity #hashnode

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20 New APIs in .NET 6

DateOnly and TimeOnly .NET 6 introduces two long-awaited types - DateOnly and TimeOnly. They represent the date or time portion of a DateTime. // public DateOnly(int year, int month, int day) //...

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 months

Anonymous functions are not cheap. Lambda can unintentionally capture local variables, resulting in unexpected additional allocations. The static modifier on lambdas since C# 9 helps to avoid it.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A new ConfigureHostOptions API on IHostBuilder has been added in .NET 6. It makes the application setup simpler. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

Are you annoyed when you open many files in Visual Studio, and they disappear at the end of the screen? You don't know how many files you opened and don't see them? It's fixed! In the newest Visual Studio 17.3, you can show tabs in multiple rows!

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces a new CreateAsyncScope method for creating AsyncServiceScope. The existing CreateScope method throws an exception when you dispose of an IAsyncDisposable service. The CreateAsyncScope provides a straightforward solution. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces new helpers for working with powers of 2. 'IsPow2' evaluates whether the specified value is a power of two. 'RoundUpToPowerOf2' rounds the specified value up to a power of two. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

C# 10 introduces a new caller expression attribute. It allows capturing an expression passed for a parameter as a string. Like other CompilerServices attributes, it is applied to an optional parameter. #dotnet6 #csharp10 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

6 months

.𝐍𝐄𝐓 𝟖 introduces the frozen collections. Two helper methods, 𝐓𝐨𝐅𝐫𝐨𝐳𝐞𝐧𝐃𝐢𝐜𝐭𝐢𝐨𝐧𝐚𝐫𝐲 and 𝐓𝐨𝐅𝐫𝐨𝐳𝐞𝐧𝐒𝐞𝐭, provide a read-only dictionary and set optimized for fast lookup and enumeration.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

.NET 6 introduces source generators for System.Text.Json. (De)serialization is based on runtime reflection, which is not the best for high-performance scenarios. A compile-time source generation is an alternative for such scenarios. #dotnet6 #json #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

New math APIs have been added in .NET 6. New methods: • SinCos • ReciprocalEstimate • ReciprocalSqrtEstimate New overloads: • Min, Max, Abs, Sign, Clamp supports nint and nuint • DivRem variants return a tuples #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

When you use inheritance in models, you can be not satisfied with the default EF Core columns order in the created tables. In EF Core 6.0, you can specify columns order with ColumnAttribute. #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

All my 26 tweets about Entity Framework Core 5.0 features in one thread for better accessibility 🧵 It's not a complete list, more features you can find by the link below 👇 Retweets are appreciated 😊 #dotnet #efcore #coding #DEVCommunity

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Oleg Kyrylchuk ✙ 🇺🇦

5 months

Did you know you can write an extension method for GetEnumerator for Range type? It allows the use of range syntax directly in the foreach loops.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

A year ago I posted my first tweet about .NET. Twitter forced me to create a blog and give my first public talks. I have been rewarded Microsoft MVP. More than 10k people followed me here and more than 3k on LI. When I started, I couldn't imagine the outcome. 1/3

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

Did you know that starting from Entity Framework Core 5.0, you can filter and sort data in Includes? Supported operations: • 'Where' • 'OrderBy' • 'OrderByDescending' • 'ThenBy' • 'ThenByDescending' • 'Skip' • 'Take' Example included below 🙂 #dotnet #efcore #coding

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

.NET 6 introduces new methods on SymmetricAlgorithm to avoid streams if the payload is already in memory: • DecryptCbc • DecryptCfb • DecryptEcb • EncryptCbc • EncryptCfb • EncryptEcb They offer a simple approach to using cryptographic APIs. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In the last preview of Visual Studio 2022, you can synchronize namespaces to match your folder structure from Solution Explorer. #dotnet #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In .NET 6, the 'JsonPropertyOrderAttribute' has been added to System.Text.Json. It allows controlling the serialization order of properties. Previously, the serialization order was determined by reflection order. #dotnet6 #json #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

1 year

Async/await in C# allows you to write asynchronous code more efficiently. However, it has drawbacks. The biggest one is if one method is async, you have to do all upper caller methods as async as well. Can we do better?

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

In EF Core 6.0, you can use DbContext pooling without dependency injection. The PooledDbContextFactory type has been made public. The pool is created with an instance of DbContextOptions that will be used to create context instances. #dotnet6 #efcore6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 months

.NET 9 preview introduces the new LINQ method CountBy. It allows for calculating the frequency of a key. This improvement looks nice. What do you think? 🤔

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

@M_Millerman How many countries are you willing to give russia to avoid nuclear war?

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

3 years

A new configuration helper 'GetRequiredSection` has been added in .NET 6. It throws an exception if a required configuration section is missing. #dotnet6 #coding #devcommunity

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

10 months

.NET 8 introduces the keyed services support in Dependency Injection. There are corresponding methods to register service by key with singleton, scoped, or transition lifetimes. To resolve the proper service there are corresponding methods or you can use attribute.

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@okyrylchuk

Oleg Kyrylchuk ✙ 🇺🇦

2 years

EF 7 introduces some query enhancements. It supports using 𝗚𝗿𝗼𝘂𝗽𝗕𝘆 as the final operator in a query. Previously, the expression could not be translated.

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