10 super awesome illustrations to be inspired by

Whether you’re preparing for a C# interview or just want to level up your coding skills, mastering these 10 patterns will help you stand out as a senior .NET developer. Each of these C# techniques demonstrates not just code fluency, but architectural maturity, performance awareness, and clean coding principles.

1. 🧠 Use Span<T> for Memory-Efficient String Processing

ReadOnlySpan<char> span = "1234567890".AsSpan();
Console.WriteLine(span.Slice(3, 4)); // Output: 4567

Why it matters: Span<T> avoids unnecessary allocations. It’s your go-to for high-performance scenarios, like custom parsers or real-time log analyzers.

2. 🎯 Replace if Chains with Pattern Matching

string result = input switch
{
null => “Null value”,
“” => “Empty string”,
_ when input.Length < 5 => “Too short”,
_ => “Valid”
};

Why it matters: Cleaner than multiple if-else conditions. Easier to read, extend, and maintain.