Bind the Data like Parent Child relationship using entities (LINQ)

This code snippet shows how to bind the Data like Parent Child relationship using entities.

Entities

public class Department
{
    public int DeptID {get; set;}
    public string DeptName {get;set;}
}

public class EmpDept
{
    public int DeptID { get;set;}
    public string DeptName {get;set;}
    public List < Employee > employee {get;set;}
}

public class Employee
{
    public int EmpID {get;set;}
    public int DeptID {get;set;}
    public string Name {get;set;}
}

Sample Data for Employee and Department entities object

List < Department > objDeptCollection = new List < Department > () {
    new Department() {
        DeptID = 1, DeptName = "Finance"
    }, new Department() {
        DeptID = 2, DeptName = "L&D"
    }, new Department() {
        DeptID = 3, DeptName = "HR"
    }, new Department() {
        DeptID = 4, DeptName = "DEV"
    }
};

List < Employee > objEmpCollection = new List < Employee > () {
    new Employee() {
        DeptID = 1, EmpID = 11, Name = "Sudheer"
    }, new Employee() {
        DeptID = 1, EmpID = 12, Name = "Suneel"
    }, new Employee() {
        DeptID = 2, EmpID = 13, Name = "Ramu"
    }, new Employee() {
        DeptID = 2, EmpID = 14, Name = "Pavani"
    }, new Employee() {
        DeptID = 3, EmpID = 15, Name = "Ishita"
    }, new Employee() {
        DeptID = 4, EmpID = 16, Name = "Yagna"
    }, new Employee() {
        DeptID = 1, EmpID = 17, Name = "Sravanthi"
    }, new Employee() {
        DeptID = 3, EmpID = 18, Name = "Kyathi"
    }
};

LINQ Query to map the objects into single Parent and child object

List < EmpDept > objBoth = new List < EmpDept > ();
objBoth = (from emp in objEmpCollection
join dept in objDeptCollection on emp.DeptID equals dept.DeptID
select(new EmpDept {
    DeptID = dept.DeptID, employee = new List < Employee > {
        new Employee {
            DeptID = emp.DeptID, Name = emp.Name, EmpID = emp.EmpID
        }
    }
})).ToList();