C#通过文件头判断flv文件

{
    string path = Application.StartupPath + "\\test.flv";
 
    //3byte 总是FLV（0x46 0x4C 0x56）
    byte[] Type = new byte[3];
    using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
    {
        fs.Read(Type, 0, Type.Length);
    }
 
    String content = Encoding.ASCII.GetString(Type, 0, Type.Length);
 
}
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