How do I return back to the start of the switch case after inputting value? C#

Question

https://code.sololearn.com/cE3QxkfibV38/?ref=app

I am currently working on a login project and I am new to C#. In my project, I entered an input of 5 different usernames/passwords into an array before starting the switch case which I have used as a menu option.
If you see case 2: I want to be able to return back to the start of the switch case after inputting the value but I do not know how to do this or if this is possible. Does anyone know if this is possible? I have insert a comment in the code where I would like to return back to the start of the switch case.

case 2:
Console.WriteLine("-----PASSWORD RECOVERY-----\n");
Console.WriteLine("Please input your username: ");
string Username1 = Console.ReadLine();
Console.Clear();
bool exitU1 = false;
for (i = 0; i < ForUser.Length; i++)
{
if (Username1 == ForUser[i])
{
exitU1 = true;
}
}

if (exitU1)
{
Console.WriteLine("-----PASSWORD RECOVERY-----\n");
Console.WriteLine("Please input your new password: ");
ForPass[i] = Console.ReadLine();
//HERE IS WHERE I WANT TO RETURN BACK TO THE START OF THE SWITCH CASE
}
else
{
Console.WriteLine("USERNAME NOT FOUND!");
}
break;

Answer 1

writer whole block of statements to be repeated inside an infinite loop