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The System.Collections and System.Collections.Specialized namespaces contain collection classes from before C# supported strongly typed classes. I am not going to cover these classes in any detail, because there is little point in using them in preference to the generic collections, but it can be useful to know how the legacy classes relate to the generic classes, especially if you are working with an old code base. When working with the legacy classes, you are responsible for ensuring that the objects that you add and retrieve from the collection are of the type you are expecting. Otherwise, using a legacy class is very similar to using the equivalent generic replacement. Listing 19-36 demonstrates the use of the System.Collections.ArrayList class, which is the legacy equivalent of List<T> in the System.Collections.Generic namespace. Listing 19-36. Using the Legacy ArrayList Class using System; using System.Collections; namespace Listing 36 { class Listing 36 { static void Main(string[] args) { // create the legacy list ArrayList list = new ArrayList() { "apple", 3, "banana", "cherry" };

Partial classes are comprised of more than one class definition. The compiler combines all the partial definitions to create a regular class. The definitions are usually split across multiple code files, although this is not a requirement. Listing 6-33 demonstrates a partial class. Related to partial classes are partial methods, which are described in 9. Listing 6-33. A Partial Class public partial class Calculator { public int CalculateProduct(int x, int y) { return x * y; }

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You may be thinking to yourself, Big deal! I wouldn t blame you, because this is a pretty boring example of applying Styles. To show you the real power of Styles, let me present you with a scenario that I recently faced. In an application I was working on, I had to populate a ListBox with PNG images. That was easy enough to do with Styles, but when one of the ListBox items (a PNG image) was selected, the background of that ListBoxItem turned blue. Turning blue when selected is the default Behavior of a ListBox. If you want to see this Behavior for yourself, press F5 to run the application and click one of the ListBox items; you will see its background turn blue. This default Behavior presented a problem for me in my application, because the designer thought it looked horrible and said that the blue background was not what he had in mind when conceptualizing the application. So, I was tasked with getting rid of the background. After some thought, I eventually came up with the idea to use Styles to override the default Behavior. This, to me, did seem like a big deal, and I feel it would be a good exercise for you to duplicate the steps I followed to override the default Behavior of the ListBox:

This is the response from the VE map server:

COM Server (External)

// Assign 5 to ss1.X and cs1.X // Assign 10 to ss1.Y and cs1.Y // Assign class instance // Assign struct instance

Figure 21-5. Syntax for the join clause The following annotated statement shows an example of the join clause: First collection and ID Item from first collection Item from second var query = from s in students join c in studentsInCourses on s.StID equals c.StID

The last type of primitive is the line. Strangely enough, you need two points to define a line. An array containing 12 vertices can be used to render 12/2 = 6 lines by calling this method: device.DrawUserPrimitives<VertexPositionColor> (PrimitiveType.LineList, vertices, 0, 6);

fileDecl ::= .file fileAttr dottedName fileEntry .hash = ( bytes ) fileEntry | .file fileAttr dottedName fileEntry fileAttr ::= /* EMPTY */ | fileAttr nometadata fileEntry ::= /* EMPTY */ | .entrypoint exptypeHead ::= .class extern exptAttr dottedName exptAttr ::= /* EMPTY */ | exptAttr private | exptAttr public | exptAttr forwarder | exptAttr nested public | exptAttr nested private | exptAttr nested family | exptAttr nested assembly | exptAttr nested famandassem | exptAttr nested famorassem exptypeDecls ::= /* EMPTY */ | exptypeDecls exptypeDecl exptypeDecl ::= .file dottedName | .class extern slashedName | .assembly extern dottedName | mdtoken ( int32 ) | .class int32 | customAttrDecl | compControl manifestResHead ::= .mresource manresAttr dottedName | .mresource manresAttr dottedName as dottedName manresAttr ::= /* EMPTY */ | manresAttr public | manresAttr private manifestResDecls ::= /* EMPTY */ | manifestResDecls manifestResDecl manifestResDecl ::= .file dottedName at int32 | .assembly extern dottedName | customAttrDecl | compControl

in Figure 5-3.

doing in Figure 2-48.

Here s the HLSL code: float4x4 xWorld; float4x4 xView; float4x4 xProjection;

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