[C#/UWP] FileIO 클래스 : WriteBufferAsync 정적 메소드를 사용해 텍스트 파일 쓰기

using Windows.Storage;
using Windows.Storage.Streams;

StorageFolder storageFolder = ApplicationData.Current.LocalFolder;

StorageFile storageFile = await storageFolder.CreateFileAsync("sample.txt", CreationCollisionOption.OpenIfExists);

DataWriter dataWriter = new DataWriter();

dataWriter.WriteString("샘플 데이터 입니다.");

await FileIO.WriteBufferAsync(storageFile, dataWriter.DetachBuffer());