How to check if all strings in a string array are all digits?

Question

I have a string, and I want it to be only digits. I tried this, using LINQ:

string[] values = { "123", "a123" };
bool allStringsContaintsOnlyDigits = true;

foreach(string value in values)
{
    if(!value.All(char.IsDigit))
    {
        allStringsContaintsOnlyDigits = false;
        break;
    }
}

if(allStringsContaintsOnlyDigits) { /* Do Stuff */ }

But a loop for only two strings (and it is guaranteed that I have two strings) is a bit tedious...

So I thought maybe doing this:

if(values[0].All(char.isDigit) && values[1].All(char.isDigit)) { /* Do Stuff */ }

But is there a more elegant way? Something like:

values.All(char.IsDigit) // for all strings

Thanks.

Note: negative numbers need to be rejected. Meaning: -125 should return false.

Answer 1

How about

values.All(s => s.All(Char.IsDigit));

That checks that for all strings in the sequence all characters are digits.