ASP.Net MVC Error

Question

Code:

 

[HttpGet]

public ActionResult Edit(int ? employeeid)

{

EmployeeDataAccess employeeDataAccess = new EmployeeDataAccess();

Employee employee = employeeDataAccess.Employees.Single(emp => emp.EmployeeId == employeeid);

return View(employee);

}

 

Error:  Sequence contains no matching element

 

Please Help me...