The first wall most people hit in a Blazor tutorial is a button that does nothing. You add @onclick to a new page in a dotnet new blazor app, click it, and the count never moves, because new pages render as static HTML. The fix is one line: @rendermode InteractiveServer. We’ll build a small national … Read more >>
You’re starting a new .NET 10 Web API, run it and type /swagger out of habit. You get a 404, because the template doesn’t ship Swashbuckle anymore. ASP.NET Core OpenAPI support is built in now: AddOpenApi and MapOpenApi write the document to /openapi/v1.json, and you add Scalar or Swagger UI to read it. We’ll build … Read more >>
To use LINQ in C#, you call query methods such as Where, Select and OrderBy on any array or list, and pass each one a small lambda that says what to keep, pick or sort by: I ran the queries below on .NET 10 against one list of six US orders, including the new LeftJoin … Read more >>
Say you run sign-in for a Phoenix dental clinic’s patient portal. When Jenna Morales logs in from a new phone, you text her a six-digit code that works once, for five minutes. To generate OTP in ASP.NET Core C#, call RandomNumberGenerator.GetInt32(0, 1_000_000) and format it with ToString(“D6”), never System.Random. We’ll build the send and verify … Read more >>
A patient check-in kiosk that anyone can maximize, minimize or close halfway through isn’t much of a kiosk. Quick answer: you disable minimize and maximize buttons in C# Windows Forms by setting MaximizeBox and MinimizeBox to false. Set ControlBox = false to remove the close button too: We ran each setting on .NET 10 in … Read more >>
Calling Random.Next in a loop is everyone’s first try to generate random numbers in C# without repeating, and it fails because nothing stops a repeat. Here’s my raffle draw for six tickets out of 50: Quick answer: put the range in an array, call Random.Shared.Shuffle (.NET 8+) and take the first N. I ran it … Read more >>
![Get the first character of each word in a string in C#: Split and Select(w => w[0]) turn Mary Ann Johnson into the initials MAJ](https://aspdotnethelp.com/wp-content/uploads/2026/11/get-first-character-of-each-word-csharp-featured.jpg)
The quickest way to get the first character of each word in a string in C# is to split the text into words, take w[0] from each one with LINQ Select, and join the letters with string.Concat: I ran it on .NET 10 against messy spacing, hyphens, lowercase acronyms, null input and the one emoji … Read more >>
Picture a Portland outdoor store exporting 2,400 product titles for a new catalog. Every title ends with a color, like “Trail Runner Jacket Navy”, and the catalog wants only “Trail Runner Jacket”. That’s a textbook remove last word from string C# job, and the quickest answer is LastIndexOf(' ') plus a range slice up to … Read more >>
To convert int to binary string with leading zeros in C#, call ToString(“B8”) on .NET 8 or later, or Convert.ToString(n, 2).PadLeft(8, ‘0’) on older frameworks: Quick answer: the number after B is the minimum digit count, so B8 turns 10 into 00001010. I ran both on .NET 10, plus negative numbers, nibble grouping and parsing … Read more >>
Here’s a bug we catch in code reviews every month: DateTime.Parse(“03/04/2026”) returns March 4 on a US server and April 3 on a UK one. Same line, two dates, no error. Quick answer: to convert string to DateTime in C#, always pass the culture: DateTime.Parse(text, CultureInfo.GetCultureInfo(“en-US”)). Use TryParse for user input and ParseExact when you … Read more >>