LazyloadingEnable and ProxyCreationEnabled?

yes, lazyloadingEnable and ProxyCreationEnabled are by default true. yes using lazyloading should be true for referencing the reference tables.
so

            this.Configuration.LazyLoadingEnabled = true;

           this.Configuration.ProxyCreationEnabled = true;

           

both must be enabled true otherwise gives error. bydefault LazyLoadingEnabled is true because of all the related entities are loaded automatically.

           

   var t = context.emps.Find(4);

as well

if any case : 

  this.Configuration.ProxyCreationEnabled = false; 

                also we can load the relavent entities using 

   var t = context.emps.Find(4);

   context.Entry(t).Reference("Dept").Load();  // Proxy Creation

  or

  context.Entry(t).Reference(t=>t.Dept).Load(); // here Dept can't be a non-generic collection.

     var s  =context.emps.Local;

    context.emps.Add(new Employee { Ename = "rani", EPhone = "7478", EmpDept = 2 });

    context.SaveChanges();

             

using local properties we can able to track the changes at client when we add, delete, ...from a collection why because Local is Property which is of

ObservableCollection<TEntity> Local { get; }.

   var s  =context.emps.Local;  // Local return type is ObservableCollection. so we can easily track the changes of a collection at dynamically.

  context.emps.Add(new Employee { Ename = "rani", EPhone = "7478", EmpDept = 2 });  //1

               var  d = context.emps.FirstOrDefault(k => k.Ename == "narayan");

               d.Ename = "prasads";                                                //2

IEnumerable<DbEntityEntry<Employee>> change =context.ChangeTracker.Entries<Employee>();

               IEnumerator<DbEntityEntry<Employee>> ier = change.GetEnumerator();

               IEnumerable<string> currentval = new List<string>();

               IEnumerable<string> original = new List<string>();

               while (ier.MoveNext())

               {

                    currentval=ier.Current.CurrentValues.PropertyNames;

                    original=ier.Current.OriginalValues.PropertyNames;

               }

immediate window

change.count()

2

context.emps.Local[0]

{EFCodeFirstDemo.Employee}

    Dept: null

    Eid: 0

    EmpDept: 2

    Ename: "rani"

    EPhone: "7478"