Question

How many parameters can you pass to a string.Format() method?

There must be some sort of theoretical or enforced limit on it. Is it based on the limits of the params[] type or the memory usage of the app that is using it or something else entirely?

Answer 1

OK, I emerge from hiding… I used the following program to verify what was going on and while Marc pointed out that a string like this ‘{0}{1}{2}…{2147483647}’ would succeed the memory limit of 2 GiB before the argument list, my findings did’t match yours. Thus the hard limit, of the number of parameters you can put in a string.Format method call has to be 107713904.

int i = 0; long sum = 0; while (sum < int.MaxValue) {     var s = sizeof(char) * ('{' + i + '}').Length;     sum += s; // pseudo append     ++i; } Console.WriteLine(i); Console.ReadLine(); 

Love the discussion people!