changes not reflecting to data base

Context=new EmployeeContext ();

var Emp = (from x in Context.Employees

where x.EMPLOYEE_ID == FindId1

select x).First();

Context.Entry(Emp).State = EntityState.Modified;

Emp.FIRST_NAME = this.FIRSTNAME;

Emp.FAMILY_NAME = this.FAMILY_NAME;

Context.SaveChanges();