怎么将Long[]转换为byte[]

我看别人把("10746350122311105403")转换出来为
{ -75, -121, 118, -13, 12, 60, -114, -121, -126, -69, -53, -11,
-71, -111, 66, 88, -81, 80, -111, 5, 109, 15, -121, -110,
-61, -34, 107, 108, -92, -117, -65, 6, -104, -126, -7, 63,
-77, -9, -126, -52, -10, 62, -67, -4, 55, -71, 0, 88, -116,
74, 24, -94, 34, 127, -123, 117, -52, 38, -30, -19, -65,
-22, 36, 101 },
请问是怎么得出的呢
比如我想把3714422464915877150long转为byte
谁给个具体做法啊

string str=Encoding.Default.GetString(bytes);
long tmp;
long.TryParse(str,out tmp);
求采纳为满意回答。