FoxLearn | How to

How to use enum flags in C#

By Tan Lee Published on Mar 04, 2025 104

Enum flags allow you to store multiple values in a single enum variable or parameter. This is a great alternative to passing multiple boolean values. You set multiple values by using a bitwise OR operation.

How to call a static method using reflection in C#

By Tan Lee Published on Mar 04, 2025 176

To call a static method using reflection in C#, follow these steps:

InvalidArgument=Value of ‘0’ is not valid for ‘SelectedIndex’

By Tan Lee Published on Mar 04, 2025 104

You might encounter the following error when setting the SelectedIndex of a ComboBox:

How to Use string interpolation instead of string.Format in C#

By Tan Lee Published on Mar 04, 2025 126

Using string.Format() can lead to errors and runtime exceptions, making code harder to maintain. String interpolation provides a safer, more readable alternative.

How to Fill a Dropdown with Enum Values in C#

By Tan Lee Published on Mar 04, 2025 140

When you need to display enum values in a dropdown (ComboBox control with DropDownStyle=DropDown), it's best to populate the list dynamically instead of manually adding each value.

Cannot use a lambda expression as an argument to a dynamically dispatched operation

By Tan Lee Published on Mar 04, 2025 70

You may encounter the following compiler error when attempting to use a lambda expression on a dynamic object:

How to consume an SSE endpoint with HttpClient in C#

By Tan Lee Published on Mar 04, 2025 157

You can consume a Server-Sent Events (SSE) endpoint using HttpClient in C# by reading the event stream asynchronously.

Async SSE endpoint in ASP.NET Core

By Tan Lee Published on Mar 04, 2025 125

Server-Sent Events (SSE) allow a client to receive real-time updates from the server. Unlike WebSockets, SSE is a simpler alternative that works over HTTP and is ideal for one-way communication, such as notifications.