在C#中从字符串转换为BigInteger而不截断前导零's

Question

在一个项目中，我需要做一个逐位&在两个相似的168个字符的位阵列之间。我在C#中工作，当我试图从String转换为BigInteger时，前导零被截断。我能做些什么来保存这些字符吗？

基本上：

string bits = "000000000000000000000000000000000000000000000000000000000000000000001111111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
BigInteger bigIntBits = BigInteger.Parse(bits);
// I am being returned 1111111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

任何事情都会有所帮助。提前谢谢。

Answer 1

您可以简单地执行以下操作：

string bits = "000000000000000000000000000000000000000000000000000000000000000000001111111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000";
// convert to big integer
var bigIntBits = BigInteger.Parse(bits);
int index = bits.IndexOf('1');            
string backToString = new string('0', index) + bigIntBits.ToString();