I have

IEnumerable<Employee> GetAllEmployees()
{
  return Get<IEmployeeRepository>().GetAll();
}

Where IEmployeeRepository is

public interface IEmployeeRepository
    {
        IEnumerable<Employee> GetAll();  
    }

Employee.cs is as under

public class Employee
    {
        public int EmployeeId { get; set; }
        public string EmployeeName { get; set; }        
        public int Age { get; set; }
        public int Salary { get; set; }
    }

Now I want to perform a search on the records obtained from GetAllEmployees() based on the EmployeeId passed. Like as under

public void SearchEmployee(int empId)
        {
            var empRecords = this.GetAllEmployees();
            var filteredRecords = empRecords.
        }

I actually looked into this answer but could not fit into the requirement. What I need to do?