Check out all the C#.Net tutorials.
Say you’re building checkout for an Austin outdoor-gear store. It takes credit cards today, ACH bank debits next month and gift cards by the holidays, and the checkout code shouldn’t change each time. Quick answer: abstraction in C# means exposing what an object does, like Pay(amount), and hiding how it does it behind an abstract … Read more >>
Say you support the back end for a Columbus, Ohio credit union. A member’s checking balance suddenly reads -$5,000.00, yet no withdrawal ever ran. Quick answer: encapsulation in C# means keeping an object’s data private and letting outside code change it only through methods and properties that enforce the rules. We rebuilt that account on … Read more >>
Payroll code is where I see inheritance used well and abused most. Inheritance in C# lets a derived class reuse and extend a base class: write class Employee : Person, and every Employee gets the members of Person plus its own. In this tutorial, I’ll map out how inheritance in C# really behaves on .NET … Read more >>
Say you’re building order intake for a Seattle coffee roaster. Every order needs a customer, a five-digit ZIP code and at least one pound of beans, and a half-built order should never exist. Quick answer: a constructor in C# is the method named after the class, with no return type, that runs on new. That’s … Read more >>
An anonymous method in C# is a block of code with no name. You write it with the delegate keyword and assign it straight to a delegate type such as Func, Action or one you declare yourself: Anonymous methods arrived in C# 2.0, and lambdas replaced them in day-to-day code a version later. They still … Read more >>
A month-end sales report I built for a retail client in Columbus, Ohio kept dropping orders placed on October 31. The C# code that picked the month’s first and last day looked fine, but the boundary was wrong. Here’s the short answer for C#: the first day of the month is new DateTime(d.Year, d.Month, 1), … Read more >>
Picture the shipping page of a Portland, Oregon, coffee roaster. Every bag ships in a carton, and each carton is just three numbers: length, width and height in inches. That’s the job of a struct in C#: a small value type that copies its data on assignment instead of sharing a reference. We’ll build that … Read more >>
Say you run shipping for a Columbus, Ohio, outdoor-gear store. Every order goes out by UPS ground, FedEx air or XPO freight, and each carrier prices a package its own way. That’s the job of an abstract class in C#: a base class you can’t create with new, where shared code lives once and each … Read more >>
A client’s Customer class had grown to 1,400 lines, and half of it was code a tool had generated. Every regeneration wiped out somebody’s hand-written fix. In this tutorial, I’ll show you how a partial class in C# fixes that, using real .NET 10 runs: the syntax across two files, the rules, partial methods, partial … Read more >>
Two classes called Order, one for billing and one for shipping, and the compiler needs to know which one you mean. That’s the whole reason namespaces exist. Quick answer: A namespace in C# is a named scope that groups related types and keeps their names unique. Declare it with namespace Lakeview.Store.Billing; and import it elsewhere … Read more >>