Geri Dönüş Türleri (Return Types)

public void PrintMessage(string message)
{
    Console.WriteLine(message);
    // Geriye hiçbir şey dönmez
}

PrintMessage("Merhaba");

public int Add(int a, int b)
{
    return a + b;
}

int result = Add(5, 3); // 8

public string GetName()
{
    return "Ali";
}

string name = GetName(); // "Ali"

public bool IsAdult(int age)
{
    return age >= 18;
}

bool result = IsAdult(25); // true

public double CalculateAverage(int[] numbers)
{
    return numbers.Sum() / (double)numbers.Length;
}

public object GetValue(int type)
{
    if (type == 1) return 42;
    if (type == 2) return "Metin";
    return null;
}

public T GetFirst<T>(List<T> items)
{
    return items[0];
}

int first = GetFirst(new List<int> { 1, 2, 3 });

public async Task FetchDataAsync()
{
    await Task.Delay(1000);
    Console.WriteLine("Tamamlandı");
}

await FetchDataAsync();

public async Task<string> FetchNameAsync()
{
    await Task.Delay(1000);
    return "Ali";
}

string name = await FetchNameAsync();

public async ValueTask<int> GetCountAsync()
{
    await Task.Delay(100);
    return 42;
}

int count = await GetCountAsync();

public dynamic GetDynamicValue()
{
    return "Metin"; // Tür çalışma zamanında belirlenir
}

dynamic value = GetDynamicValue();

public (int, string) GetUserInfo()
{
    return (25, "Ali");
}

var (age, name) = GetUserInfo();

public int[] GetNumbers()
{
    return new int[] { 1, 2, 3 };
}

int[] numbers = GetNumbers();

public List<string> GetNames()
{
    return new List<string> { "Ali", "Veli" };
}

List<string> names = GetNames();

public IEnumerable<int> GetNumbers()
{
    yield return 1;
    yield return 2;
    yield return 3;
}