class Program
{
    static void Main(string[] args)
    {
        int num = 10;
        Console.WriteLine("Before: " + num); // Output: Before: 10
        ModifyByRef(ref num);
        Console.WriteLine("After: " + num);  // Output: After: 20
    }

    // Method that modifies the integer by reference
    static void ModifyByRef(ref int x)
    {
        x = x * 2; // Modify the original value by reference
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim num As Integer = 10
		Console.WriteLine("Before: " & num) ' Output: Before: 10
		ModifyByRef(num)
		Console.WriteLine("After: " & num) ' Output: After: 20
	End Sub

	' Method that modifies the integer by reference
	Private Shared Sub ModifyByRef(ByRef x As Integer)
		x = x * 2 ' Modify the original value by reference
	End Sub
End Class

class Program
{
    static void Main(string[] args)
    {
        int result;
        Calculate(10, 5, out result);
        Console.WriteLine("Result: " + result); // Output: Result: 15
    }

    // Method that calculates the sum of two integers and outputs the result by reference
    static void Calculate(int x, int y, out int result)
    {
        result = x + y; // Assign the sum to the out parameter
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim result As Integer = Nothing
		Calculate(10, 5, result)
		Console.WriteLine("Result: " & result) ' Output: Result: 15
	End Sub

	' Method that calculates the sum of two integers and outputs the result by reference
	Private Shared Sub Calculate(ByVal x As Integer, ByVal y As Integer, ByRef result As Integer)
		result = x + y ' Assign the sum to the out parameter
	End Sub
End Class