C#获取文件MD5

public static string GetFileMD5(string filePath)
{
    using (FileStream fs = new FileStream(filePath, FileMode.Open))
    {
    　　System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
    　　byte[] bytes = md5.ComputeHash(fs);

    　　StringBuilder sb = new StringBuilder();
    　　for (int i = 0; i < bytes.Length; i++)
    　　{
        　　sb.Append(bytes[i].ToString("x2"));
    　　}
    return sb.ToString();
}