C# 读取文件流

/// <summary>
/// 读取文件流
/// </summary>
public static byte[] ReadFileStream(string filePath)
{
    Stream source = null;
    byte[] readBytes = null;
    try
    {
        // 读取文件
        source = new FileStream(filePath, FileMode.Open, FileAccess.Read);
        readBytes = new byte[source.Length];
        source.Read(readBytes, 0, (int)source.Length);
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        if (source != null)
        {
            source.Close();
        }
    }
    return readBytes;
}