class Employee {
 int EmployeeID {get;set;}
 string FirstName {get;set;}
 List<OfficeLocations> OfficeLocations {get;set;}
}

class OfficeLocations {
 int OfficeLocationsID {get;set;}
 //foreign key
 int EmployeeID {get;set;}
 string CityLocation {get;set;}
 string State {get;set;}
}

@model List<Project.Models.OfficeLocations>
 @for (int i = 0; i < Model.Count; i++) {
  @Html.EditorFor(m => m[i].Value1, new { htmlAttributes = new { @class = "my_editor" } })
  @Html.HiddenFor(m => m[i].OfficeLocationsID)
  @Html.HiddenFor(m => m[i].EmployeeID)
 }
 //extra editor box for adding a new value
 @Html.Editorfor(??????.Value)