C# - Get The Count From IQueryable?

I am implementing paging in my GridView. From this article, I need two methods:

public IQueryable BindEmployees(int startRowIndex, int maximumRows)
{
EmployeeInfoDataContext dbEmp = new EmployeeInfoDataContext();
var query = from emp in dbEmp.Employees
join dept in dbEmp.Departments
on emp.DeptID equals dept.DeptID
select new
{
EmpID = emp.EmpID,
EmpName = emp.EmpName,
Age = emp.Age,
Address = emp.Address,
DeptName = dept.DepartmentName
};
return query.Skip(startRowIndex).Take(maximumRows);
}

And

public int GetEmployeeCount()
{
// How can I not repeat the logic above to get the count?
}

How can I get the value of the second method GetEmployeeCount from the first method BindEmployees ? I mean without repeating the logic (the query)?