C# 写入文件流

/// <summary>
/// 写入文件流
/// </summary>
/// <param name="filePath">文件路径（包括文件名和后缀）</param>
/// <param name="data">要存储的数据</param>
public static void WriteFileStream(string filePath, byte[] data)
{
    Stream source = null;
    try
    {
        // 判断文件夹是否存在
        string directoryName = Path.GetDirectoryName(filePath);
        if (!string.IsNullOrEmpty(directoryName))
        {
            if (!Directory.Exists(directoryName))
            {
                Directory.CreateDirectory(directoryName);
            }
        }
        // 覆盖文件
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
        }
        // 写入文件
        source = new FileStream(filePath, FileMode.Create);
        source.Write(data, 0, data.Length);
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        if (source != null)
        {
            source.Close();
        }
    }
}