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int.TryParse failing with Console.ReadLine() in C#

If I try the following code in a simple console application:

string input = Console.ReadLine();
bool isString = int.TryParse(input, out myid);

I receive an error saying "the best overloaded method match for 'int.TryParse(string out int)' has some invalid arguments. I cannot work out why. Can anyone shed any light on this please?

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You need to declare myid as int before you pass it to int.TryParse

int myid;
string input = Console.ReadLine();
bool isString = int.TryParse(input, out myid);

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