Bits of .NET

Checking object types with multiple if-else is messy. Switch expressions with type patterns are cleaner.

Old If-Else Chain:

object obj = GetData();

if (obj is string s)
{
    Console.WriteLine($"String: {s.Length} chars");
}
else if (obj is int i)
{
    Console.WriteLine($"Number: {i * 2}");
}
else if (obj is List list)
{
    Console.WriteLine($"List: {list.Count} items");
}

Switch Expression:

var message = obj switch
{
    string s => $"String: {s.Length} chars",
    int i => $"Number: {i * 2}",
    List list => $"List: {list.Count} items",
    null => "Object is null",
    _ => "Unknown type"
};

Console.WriteLine(message);

Cleaner, more concise, compiler-verified!