Most people’s first try at multiple inheritance in C# looks like class Thermostat : Device, WifiModule. It won’t compile. The .NET 10 compiler stops with CS1721, because a C# class can have only one base class. Quick answer: keep one base class and implement as many interfaces as you need: class Thermostat : Device, INetworked, … Read more >>
Say you’re reviewing a pull request for a San Diego coffee roaster’s order system and you find clsOrder, order_helper, OrderBase and a class called Orders inside the Orders namespace. Quick answer: the C# class naming conventions are PascalCase nouns with no prefix, a suffix only when the base type asks for one, and I only … Read more >>
The C# boolean naming convention is to name a bool like a yes/no question: start it with Is, Has, Can or Should, use camelCase for locals, PascalCase for properties and methods, and _camelCase for private fields: Every example below ran on .NET 10 in a checkout for Bayou Coffee Roasters, a made-up New Orleans coffee … Read more >>
Upgrading a .NET 8 app to .NET 10 took me one afternoon, and most of it was package work. With .NET 8 support ending November 10, 2026, now’s the time to move. The short answer: to upgrade .NET 8 to .NET 10, install the .NET 10 SDK, point global.json at it, change net8.0 to net10.0, … Read more >>
![What's new in C# 14: an extension block adding a Total extension property to decimal[] with the real output 2150](https://aspdotnethelp.com/wp-content/uploads/2026/10/whats-new-in-csharp-14-featured.jpg)
What’s new in C# 14? Extension members (extension properties and static extension members), the field keyword, null-conditional assignment with ?.=, nameof(List<>), implicit span conversions and a few smaller upgrades. In this tutorial, I’ll run what’s new in C# 14 one feature at a time. Each one gets a tiny .NET 10 program, its real output … Read more >>
A pull request for a Texas retailer’s order system hit my queue last week with custName, CUST_ID, and m_total in one class. That’s three naming conventions fighting inside 40 lines of C#. Here’s the quick answer. C# uses PascalCase for types, namespaces, methods, properties, events, and constants, camelCase for local variables and parameters, _camelCase for … Read more >>
.NET 10 came out on November 11, 2025, and it’s a long-term support release. That alone makes it the version I’d pick for any new C# or ASP.NET Core project in 2026. So, what’s new in .NET 10? You can run a single .cs file with dotnet run app.cs, write C# 14, validate Minimal API … Read more >>
Job posts in Seattle, Austin and New York still say “.NET Core developer,” but the .NET Core interview questions you’ll hear in 2026 are about .NET 10, ASP.NET Core, dependency injection, middleware and EF Core. The “Core” name was dropped after 3.1. In this tutorial, I’ll answer 40 .NET Core interview questions with short answers … Read more >>
Senior C# interviews in 2026 don’t ask you to define a class anymore. They hand you five lines of code and ask what it prints, then ask why. The C# interview questions for experienced developers below are the ones I keep seeing in US loops: type system traps, garbage collection, async/await, LINQ, modern C# 14 … Read more >>
C# (pronounced “C sharp”) is Microsoft’s free, general-purpose programming language for building web apps, APIs, cloud services, desktop apps and Unity games. You write C#, and the .NET platform compiles and runs it on Windows, macOS and Linux. In this tutorial, I’ll explain what is C# in plain English, then have you write and run … Read more >>