SAAT: Data Grid and Data Island

Operator overloadability

The null-coalescing operator cannot be overloaded.

C# language specification

For more information, see The null coalescing operator section of the C# language specification.

SAAT:

Data Binding in WPF used to connect the flow of data between UI and the code. Binding can be performed in two different ways:
1. Data Island - creating data in the immediate window
2. The data source is used to retrieve data and then use in the window.

Class is required in both cases that contains the definition of data.