The below does not compile:

Func<int, int> fac = n => (n <= 1) ? 1 : n * fac(n - 1);

Local variable 'fac' might not be initialized before accessing

How can you make a recursive function with lambdas?

[Update]

Here are also two links that I found interesting to read:

  1. Eric Lippert's "Why does a recursive lambda cause a definite assignment error?"
  2. Anonymous Recursion in C#
c# recursion lambda factorial
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