using System;
using System.Globalization;
public class MainClass{
public static void SafeSwap(ref int i, ref int j)
{
int temp = i;
i = j;
j = temp;
}
static void Main(string[] args)
{
int i = 10, j = 20;
Console.WriteLine("Values before safe swap: i = {0}, j = {1}", i, j);
SafeSwap(ref i, ref j);
Console.WriteLine("Values after safe swap: i = {0}, j = {1}", i, j);
}
}
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