WinForms – How to remove checked items from CheckedListBox

Normally the items in a CheckedListBox are hardcoded or added programmatically (from an enum, or from some data source). But sometimes you may want to allow the user to add and remove items from a CheckedListItem. In this article I’ll show how to add items and remove them. I’ll be working with text, and will … Read more

ASP.NET – InvalidOperationException: Synchronous operations are disallowed

Problem You’re trying to do synchronous IO operations in ASP.NET and you get the following exception: System.InvalidOperationException: ‘Synchronous operations are disallowed. Call WriteAsync or set AllowSynchronousIO to true The reason you’re getting this is because server option AllowSynchronousIO is false. Starting in ASP.NET Core 3.0, this is false by default. Solution Microsoft turned this setting … Read more