I have two model with properties like : export class Users { UserId: string; FirstName: string; LastName: string; } export class Address{ AddressId: string; Location: string; PinCode: string; } Create one more model to call them, like export class AddCustomers { UserEntity: Users; AddressEntity: Address; } But whenever, i trying to access like this: myObject:AddCustomers= new AddCustomers(); myObject.UserEntity.FirstName= "Tim" ; // it display error, Firstname not defined

Hi Reena, Since UserEntity is object of another class, you need to inialize that object first. replace the line in which you get error like below and try myObject.UserEntity={}; myObject.UserEntity.FirstName= "Tim" ; Do the same for AddressEntity object also. Thanks, Jayakumar B

'UserEntity' and 'AddressEntity' both are object of other class, you need to initialize that object first like myObject.UserEntity= new Users(); //import Users to your component file myObject.AddressEntity= new Address(); After that you can use any of the property of that using, like myObject.UserEntity.FirstName= "Tim"