Solved: ASP.NET - Why I am getting invalid column name using MVC4?

Hello...Please help me with this error I encountered.. "Invalid column name 'DepartmentId'"..Below is my Code

EmployeeController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MVCDemo.Models;

namespace MVCDemo.Controllers
{
    
    public class EmployeeController : Controller
    {

        public ActionResult Index(int departmentId)
        {

            EmployeeContext employeeContext = new EmployeeContext();
            List<Employee> employees = employeeContext.Employees.Where(emp => emp.DepartmentId == departmentId).ToList();
            return View(employees);
        }

        public ActionResult Details(int id)
        {

            EmployeeContext employeeContext = new EmployeeContext();
            Employee employee = employeeContext.Employees.Single(emp => emp.employeeId == id);

            return View(employee);
        }

    }
}

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EmployeeContext.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace MVCDemo.Models
{
    public class EmployeeContext : DbContext
    {   
        public DbSet<Employee> Employees { get; set; }
        public DbSet<Department> Departments { get; set; }


    }
}

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DepartmentController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MVCDemo.Models;

namespace MVCDemo.Controllers
{
    public class DepartmentController : Controller
    {   
        public ActionResult Index()
        {
            EmployeeContext employeeContext = new EmployeeContext();
            List<Department> departments = employeeContext.Departments.ToList();

            return View(departments);
        }

    }
}

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Employee.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace MVCDemo.Models
{
    [Table("employeeDetails")]
    public class Employee
    {
        [Key]
        public int employeeId { get; set; }
        public string employeeName { get; set; }
        public string employeeGender { get; set; }
        public string employeeCity { get; set; }
        public int DepartmentId { get; set; }
        
    }
}

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Department.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace MVCDemo.Models
{
    [Table("employeeDepartment")]
    public class Department
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public List<Employee> Employees { get; set; }
    }
}

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Im getting error here

List<Employee> employees = employeeContext.Employees.Where(emp => emp.DepartmentId == departmentId).ToList();

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