datamatrix c# library MANAGED-UNMANAGED TRANSITIONS in C#.net

Implement gs1 datamatrix barcode in C#.net MANAGED-UNMANAGED TRANSITIONS

Unfortunately, the only indication of how actions are processed in the regular user interface (UI) is a single word. As shown in Figure 4-3, then indicates serial; and indicates parallel. This is not the easiest difference in the world to spot and it will likely cause some consternation as you work through your processes.

Obviously, if you do care about the difference between a null and an empty value, you can just use a regular SqlDataReader to retrieve the data. In this case, .NET 2.0 includes the new Nullable<T> generic type that helps manage null database values. This new type is very valuable when you do care about null values: when business rules dictate that an empty value like 0 is different from null.

The code could be simplified by only supporting binding to an object but by supporting any valid data source (including ADO.NET objects, or arrays of simple values), it provides a more flexible solution.

Types are usually declared directly inside a namespace. You can, however, also declare types inside a class or struct declaration. Types declared inside another type declaration are called nested types. Like all type declarations, nested types are templates for an instance of the type. A nested type is declared like a member of the enclosing type. A nested type can be any type. An enclosing type can be either a class or a struct. For example, the following code shows class MyClass, with a nested class called MyCounter. class MyClass { class MyCounter { ... } ... } // Enclosing class // Nested class