NonRecursiveFibonacci.cs

// List to store Fibonacci numbers:
List<ulong> fibonacciNumbers = new List<ulong>();

// Generate Fibonacci numbers just summing up the
// last previous fibonacci numbers
Enumerable.Range(0, 200)
    .ToList()
    .ForEach(k =>
        fibonacciNumbers.Add(k <= 1 ? 1:
            fibonacciNumbers[k-2] + fibonacciNumbers[k-1]));

// Lists the first 53 Fibonacci numbers:
fibonacciNumbers.Take(53).Dump("Fibonacci Numbers");