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Cryptography 101 for the .NET Framework

, 22 Dec 2006
An introduction to key cryptographic concepts supported by the .NET Framework.
cryptohelper.zip
CryptoHelper
bin
Release
CryptoHelper.dll
My Project
Application.myapp
Settings.settings
SimpleEncryptor
bin
Release
CryptoHelper.dll
SimpleEncryptor.exe
SimpleEncryptor.vshost.exe
My Project
Application.myapp
Settings.settings
SimpleEncryptor.vbproj.user
'------------------------------------------------------------------------------
' <auto-generated>
'     This code was generated by a tool.
'     Runtime Version:2.0.50727.42
'
'     Changes to this file may cause incorrect behavior and will be lost if
'     the code is regenerated.
' </auto-generated>
'------------------------------------------------------------------------------

Option Strict On
Option Explicit On


Namespace My

    <Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute(),  _
     Global.System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "8.0.0.0"),  _
     Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _
    Partial Friend NotInheritable Class MySettings
        Inherits Global.System.Configuration.ApplicationSettingsBase
        
        Private Shared defaultInstance As MySettings = CType(Global.System.Configuration.ApplicationSettingsBase.Synchronized(New MySettings), MySettings)
        
#Region "My.Settings Auto-Save Functionality"
#If _MyType = "WindowsForms" Then
        Private Shared addedHandler As Boolean

        Private Shared addedHandlerLockObject As New Object

        <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(), Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)> _
        Private Shared Sub AutoSaveSettings(ByVal sender As Global.System.Object, ByVal e As Global.System.EventArgs)
            If My.Application.SaveMySettingsOnExit Then
                My.Settings.Save()
            End If
        End Sub
#End If
#End Region
        
        Public Shared ReadOnly Property [Default]() As MySettings
            Get
                
#If _MyType = "WindowsForms" Then
                   If Not addedHandler Then
                        SyncLock addedHandlerLockObject
                            If Not addedHandler Then
                                AddHandler My.Application.Shutdown, AddressOf AutoSaveSettings
                                addedHandler = True
                            End If
                        End SyncLock
                    End If
#End If
                Return defaultInstance
            End Get
        End Property
    End Class
End Namespace

Namespace My
    
    <Global.Microsoft.VisualBasic.HideModuleNameAttribute(),  _
     Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
     Global.System.Runtime.CompilerServices.CompilerGeneratedAttribute()>  _
    Friend Module MySettingsProperty
        
        <Global.System.ComponentModel.Design.HelpKeywordAttribute("My.Settings")>  _
        Friend ReadOnly Property Settings() As Global.SimpleEncryptor.My.MySettings
            Get
                Return Global.SimpleEncryptor.My.MySettings.Default
            End Get
        End Property
    End Module
End Namespace

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Toby Emden
Architect
United States United States
Toby Emden has been coding since the early days of 8-bit home computers, when developers had to write pure assembly to get anything worthwhile done. As a mere ankle-biter, his first coding projects included several games written for the ZX Spectrum in pure Z80 assembly code. Nowadays, his languages of choice are C++, C# and Java.
 
A member of the IEEE Computer Society and Worldwide Institute of Software Architects, Toby has spent ten years as an I.T. security executive, delivering enterprise security solutions for Fortune 100 organizations.
 
When not boring people at parties with jokes about cryptography and polymorphism, he enjoys writing, traveling and spending quality time with his wife and three cats. He still hasn't figured out how to cure cancer with .NET, but figures world peace can be solved with a Java wrapper class.

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