how to overwrite a variable inside a if loop? c# [duplicate]

I wanna use a variable outside the if loop but it dosen't look good.

    static void Main(string[] args)
    {
        int profil_num;
        string Text = "1";
        if (Text == "1")
        {
            profil_num = Convert.ToInt32(Text) - 1;
        }

        if (Text == "2")
        {
            profil_num = Convert.ToInt32(Text) - 1;
        }

        else
        {
            Console.WriteLine("Fehler");
        }
        Console.WriteLine(profil_num);
    }

I can't print profil_num! Does anyone know why the program doesn't work