/// <summary>
/// 创建一个临时文件
/// </summary>
/// <param name="extension">临时文件的扩展名</param>
/// <returns>新创建的临时文件，该文件会在程序退出时自动删除</returns>
public static IFile CreateTemporaryFile(string extension = "")
{
if (TemporaryLimit is { } limit&& TemporaryDirectory.Size > TemporaryLimit)
{
TemporaryDirectory.Clear();
}
return(TemporaryDirectory.CreateFile(null, extension));
}
