Craig'sUtilityLibrary是功能性的基类。已经包装得很完善，可以安装单个命名空间的包。例如官方列出了：DataTypes: Install-Package CraigsUtilityLibrary-DataTypesLDAP: Install-Package CraigsUtilityLibrary-LDAPSQL: Install-Package CraigsUtilityLibrary-SQLEncryption: Install-Package CraigsUtilityLibrary-EncryptionCaching: Install-Package CraigsUtilityLibrary-CachingM