C#编程-22：判断文件是否存在并创建文件（夹）

string path = @"D:\abc";

string fileName = "123.txt";

\

if (!Directory.Exists(path))

{

    Directory.CreateDirectory(path);

}

\

if (!File.Exists(path + "\" + fileName))

{

    File.Create(path + "\" + fileName);

}