Direct array initialization with a constant value

Question

Whenever you allocate a new array in C# with

new T[length]

the array entries are set to the default of T. That is null for th

Answer 1

I suggest using Array.Fill as a very succint way to fill an array with an initial value:

bool[] isPrime = new bool[MaxNum];
Array.Fill(isPrime, true);

This initializes all values in the isPrime array to true.