emp.BirthDate: ["Unexpected character encountered while parsing value: {. Path 'BirthDate', line 1, position 14.",…]
0: "Unexpected character encountered while parsing value: {. Path 'BirthDate', line 1, position 14."
1: "After parsing a value an unexpected character was encountered: :. Path 'BirthDate', line 1, position 20."

<div class="input-group-append">
<button class="btn btn-outline-secondary calendar px-20" (click)="d.toggle()"
         type="button">Calendar</button>
</div>
<input class="form-control"
    [startDate]="{year: 1992, month: 11}"
    placeholder="Birth (yyyy-mm-dd)"
    name="dp"
    [(ngModel)]="newEmployee.BirthDate"
    ngbDatepicker
    #d="ngbDatepicker">
</div>

BirthDate: Date; // Angular

public DateTime BirthDate { get; set; } // Web api

emp:
   BirthDate: {year: 1992, month: 11, day: 11}
   FirstName: "sadsa"
   Gender: "male"
   Lastname: "asdsa"
   Rank: {ID: 6, Name: "Chief Engineer", Employee: null}