Traditional error handling in C#

Every C# developer, whether a novice or an expert, has come across the try-catch block. It’s been the main protection against unexpected behaviors and system failures. Let’s revisit this conventional mechanism before understanding what the functional paradigm offers.

try-catch blocks

The try-catch block attempts an operation, and if it fails, the control is transferred to the catch block, ensuring the application doesn’t crash. For instance, let’s say we’re working with a simple file-reading operation:

string content;
try
{
    content = File.ReadAllText("file.txt");
}
catch (FileNotFoundException ex)
{
    content = string.Empty;
    LogException(ex, "File not found. Check the file location.");
}
catch (IOException ex)
{
    content = string.Empty;
    LogException(ex, "An IO error...