using System;
class Example {
public static void Main() {
int x; // known to all code within Main()
x = 10;
if(x == 10) { // start new scope
int y = 20; // known only to this block
// x and y both known here.
Console.WriteLine("x and y: " + x + " " + y);
}
// y = 100; // Error! y not known here
// x is still known here.
Console.WriteLine("x is " + x);
}
}
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