AIPのSDKをC#で呼び出すサンプル
■MIP SDKのセットアップ
https://docs.microsoft.com/ja-jp/information-protection/develop/setup-configure-mip
■ラベルの取得
https://docs.microsoft.com/ja-jp/information-protection/develop/quick-app-initialization-csharp
■ラベルを付与
https://docs.microsoft.com/ja-jp/information-protection/develop/quick-file-set-get-label-csharp