Resolved new DOB().U().O

[jack]

I am new at this language I want to see what is relation between all 3 (DOB , U , O).
However actual question I Encounter is below.

new DbContextOptionsBuilder<AppDbContext>()

            .UseInMemoryDatabase(databaseName: "BookDbTest")

            .Options;

I Know DbContextOptionsBuilder() is constructor.

But what is meaning Constructor.UseInMemoryDatabase() --> what it is calling Method,... ?
What actually it is calling after dot

What is the Whole Meaning of Sentence?

 

[Skydiver]

Looks like an Entity Framework question...

 

[Skydiver]

Line 1 creates an object.
Line 3 calls a method on the object; OR uses an extension method passing in the object was created on line 1. Either way an object is returned.
Line 5 accesses a property on the object returned on line 3.

The code above could have been written as:

var obj1 = new DbContextOptionsBuilder<AppDbContext>();
var obj2 = obj1.UseInMemoryDatabase(databaseName: "BookDbTest");
obj2.Options;