Nachschlagen: Spickzettel

// Variablen und Konstanten
var x = 5; const int Max = 10; string? n = null;

// Kontrolle
if (...) { } else if (...) { } else { }
var ergebnis = wert switch { > 10 => "gross", _ => "klein" };
for (...) { } foreach (var e in liste) { } while (...) { } do { } while (...);

// Methoden
int Add(int a, int b) => a + b;
void Tausche(ref int a, ref int b) { }
bool TryX(string s, out int w) { w = 0; return true; }

// Klassen
class A : B, IX { public int P { get; set; } public A() { } public override string ToString() => ""; }
record R(string Name, int Alter);
struct S { public int X; }
enum E { Eins, Zwei }
interface IX { void M(); }

// Fehler
try { } catch (Exception e) when (...) { } finally { }
throw new ArgumentException("...");

// Async
async Task<int> LadeAsync() { await Task.Delay(1); return 1; }

// LINQ
liste.Where(x => x > 1).Select(x => x * 2).OrderBy(x => x).ToList();

// Null
a ?? b; a?.B; a ??= b; a!;

// Muster
if (o is string s && s.Length > 0) { }