using System;

public class Program

{

    public static void Main()

    {

        LeaveApplication app = new LeaveApplication();

        byte val = 1;

        app.LeaveType = (EnumList.LeaveType)byte.Parse("1");

        // Solution 1

        Console.WriteLine(app.LeaveType);

        // Solution 2

        Console.WriteLine(Enum.Parse(typeof(EnumList.LeaveType), "1"));

    }

}

​

public class LeaveApplication

{

    public Guid Id { get; set; }

    public string EmployeeId { get; set; }

    public DateTime StartDate { get; set; }

    public DateTime EndDate { get; set; }

    public EnumList.LeaveType LeaveType { get; set; }   

}

​

public class EnumList

{

    public enum LeaveType : byte

    {

        Annual = 1,

        Casual = 2,

        Compassionate = 3,

        Maternity = 4

    }

}