SyntaxFix

[c#] find index of an int in a list

FindIndex seems to be what you're looking for:

FindIndex(Predicate<T>)

Usage:

list1.FindIndex(x => x==5);

Example:

// given list1 {3, 4, 6, 5, 7, 8}
list1.FindIndex(x => x==5);  // should return 3, as list1[3] == 5;

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