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In this section, you build a simple control (the default control Visual Studio generates for you) and see how it fits on a Web Form . Visual Studio creates a simple control that contains a single Text property, and it renders that Text property to the end browser . It s a good way to discover how server-side controls work .

note When reading byte by byte, you get the single byte values of each character rather than the characters themselves, much like when you do something like puts "test"[0]. To convert into text characters, you can use the chr method.

AssemblyRef #1 Token: 0x23000001 Public Key or Token: b7 7a 5c 56 19 34 e0 89 Name: mscorlib Major Version: 0x00000001 Minor Version: 0x00000000 Build Number: 0x00000c1e Revision Number: 0x00000000 Locale: <null> HashValue Blob: Flags: [none] (00000000)

Sample of Visual Basic Code Protected Sub Page_Load(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Load Throw New ApplicationException("Example exception.") End Sub Sample of C# Code protected void Page_Load(object sender, EventArgs e) { throw new ApplicationException("Example exception."); }

2. Lucerne Publishing has already configured a PPTP-type VPN, but it wants to allow users who log on to the company domain to avoid having to type their user name and password twice. How can you allow users to avoid typing in their credentials in both the Log On To Windows screen and the VPN connection dialog box Which authentication protocols can be used over this VPN connection

9

WebRequest is an abstract class that encapsulates functionality common to all Internet requests. Implementation classes that represent a specific protocol are not required to deal with all of the features, so many of the properties in the class can throw a System.NotSupportedException to indicate that the feature has no meaning for the protocol that will be used to handle the request.

Built-in constant values required by the languages: null, void, true, and false. Built-in simple data types: char, int, byte, and so forth.

Since properties are really just methods, and because C# and the CLR allow methods to be generic, sometimes people want to define properties that introduce their own generic type parameters (as opposed to using the enclosing type s generic type parameter) . However, C# does not allow this . The main reason why properties cannot introduce their own generic type parameters is because they don t make sense conceptually . A property is supposed to represent a characteristic of an object that can be queried or set . Introducing a generic type parameter would mean that the behavior of the querying/setting could be changed, but conceptually, a property is not supposed to have behavior . If you want your object to expose some behavior generic or not define a method, not a property .

Practice: Deploying a Stub Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-71

Each CA in a CA hierarchy has a digital certificate that represents the CA. The certificate has an associated public key and private key. If attackers can gain access to a CA s private key and export the certificate and associated keys, they can build a replica of the CA and issue network-valid certificates. You must protect all the CA s private and public key pairs so that attackers cannot gain access to them. If you use a software-based cryptographic service provider (CSP), any member of the local Administrators group can export the CA s private key and certificates to a portable file format. This exported private key can then be imported to any computer, which can then issue certificates that are trusted on your organization s network. In addition, because the rogue certificates are not known by the true CA, they cannot be easily revoked. The only way to recover from such an attack is to invalidate the CA certificate, implement a replacement CA, and reissue all certificates issued by the attacked CA. You can take the following measures to protect the CAs in your CA hierarchy from these types of attacks:

Click the domain (example.local in Figure 7-14) and select Raise Domain Functional Level from the Action menu to open the dialog box shown in Figure 7-15.