private void OutValue() {
Console.WriteLine("C# 7.0 Out Variable...\n");
string maybeNumericString = "7";
Console.Write("Old way: ");
if (int.TryParse(maybeNumericString, out value)) {
Console.WriteLine($"{value} is a number.");
Console.WriteLine($"{maybeNumericString} is not a number!");
Console.Write("New way: ");
if (int.TryParse(maybeNumericString, out int value2)) {
Console.WriteLine($"{value2} is a number.");
Console.WriteLine($"{maybeNumericString} is not a number!");