using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(MachinePermissionsExtensions.FindBitPosition(MachinePermissions.TimeAccess));

    }

}

​

​

public static class MachinePermissionsExtensions

{

    public static int? FindBitPosition(this MachinePermissions machinePermission)

    {

        var result = default(int?);

        for (int i = 0; i < 8; i++)

        {

            if ((1 << i) == (int)machinePermission)

            {

                result = i;

                break;

            }

        }

        return result;              

    }   

}

​

​

public enum MachinePermissions

{

    None              = 0,

    TimeAccess        = 1,

    DataLogger        = 2,

    MachinesTracklogs = 4

}

​