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Constructors are special methods that allow an instance of a type to be initialized to a good state . Constructor methods are always called .ctor (for constructor) in a method definition metadata table . When creating an instance of a reference type, memory is allocated for the instance s data fields, the object s overhead fields (type object pointer and sync block index) are initialized, and then the type s instance constructor is called to set the initial state of the object . When constructing a reference type object, the memory allocated for the object is always zeroed out before the type s instance constructor is called . Any fields that the constructor doesn t explicitly overwrite are guaranteed to have a value of 0 or null . Unlike other methods, instance constructors are never inherited . That is, a class has only the instance constructors that the class itself defines . Since instance constructors are never inherited, you cannot apply the following modifiers to an instance constructor: virtual, new, override, sealed, or abstract . If you define a class that does not explicitly define any constructors, the C# compiler defines a default (parameterless) constructor for you whose implementation simply calls the base class s parameterless constructor .

The Windows Security Center should be familiar, at least conceptually, to anyone who s previously used Windows XP. In Windows Vista, this dialog box is available from the top of the Security page in Control Panel and covers the territory shown in Figure 2-12.

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window will show whatever you specified as the name. Unlike in managed code, in native code, you can change the thread name all you want. Finally, only the first 31 characters of the name are shown in the debugger. typedef struct tagTHREADNAME_INFO { DWORD DWORD DWORD dwType ; // Must be 0x1000 ; // Pointer to name (in user addr space) ; // Reserved for future use, must be zero LPCSTR szName dwFlags

In this chapter: Mapping Your Needs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Security Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Managing Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 Security Roles and Business Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

The primary means to configure zone settings is through the zone properties dialog box, which is accessible through the DNS console. Each properties dialog box for a standard zone has five tabs: General, Start Of Authority (SOA), Name Servers, WINS, and Zone Transfers. Properties dialog boxes for Active Directory integrated zones include a sixth tab, Security, that allows you to configure access permissions for the zone. To open a properties dialog box for a particular zone, right-click the node of the zone you want to configure in the DNS console, and then select Properties, as shown in Figure 5-13.

Used by the .NET Framework for locating, loading, and referencing Visible in le s properties in Windows Explorer.

To demonstrate the significance of this performance hit, I wrote the following code:

In the fourth assignment, you see some real value of using C# s implicitly typed local variable feature Without this feature, you d have to specify Dictionary<String, Single> on both sides of the assignment operator Not only is this a lot of typing, but if you ever decide to change the collection type or any of the generic parameter types, then you would have to modify your code on both sides of the assignment operator, too In the foreach loop, I also use var to have the compiler automatically infer the type of the elements inside the collection This demonstrates that it is possible and quite useful to use var with foreach, using, and for statements It can also be useful when experimenting with code .

16 Implementing, Managing, and Maintaining Routing And Remote Access (4.0)

UPDATE dbo.OrderTotals SET totalqty = totalqty * 2;