The purpose of this article is to demonstrate a reasonably quick and effective method of license protection using the .NET framework s built-in RSA cryptography components to digitally sign and verify license terms for an application.

RSALicenseExample.sln
.................\bin
.................\...\Release
.................\...\.......\privateKey.xml
.................\...\.......\RSALicenseExample.exe
.................\...\.......\RSALicenseExample.pdb
.................\...\.......\RSALicenseExample.vshost.exe
.................\...\.......\RSALicenseExample.vshost.exe.manifest
.................\...\.......\RSALicenseExample_BIN.zip
.................\...\.......\Test.lic
.................\...\x86
.................\...\...\Debug
.................\...\...\.....\RSALicenseExample.exe
.................\...\...\.....\RSALicenseExample.vshost.exe
.................\...\...\.....\RSALicenseExample.vshost.exe.manifest
.................\General
.................\.......\IO
.................\.......\..\Serializer.cs
.................\.......\Security
.................\.......\........\RSA.cs
.................\Main.cs
.................\Main.Designer.cs
.................\Main.resx
.................\privateKey.xml
.................\Program.cs
.................\Properties
.................\..........\AssemblyInfo.cs
.................\..........\Resources.Designer.cs
.................\..........\Resources.resx
.................\..........\Settings.Designer.cs
.................\..........\Settings.settings
.................\Resources
.................\.........\publicKey.xml
.................\RSALicenseExample.csproj
.................\RSALicenseExample.csproj.user
.................\Test.lic
RSALicenseExample.suo

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