C＃中的二进制到十进制转换

Question

This is how to convert from decimal to binary:

int dec = 42;
string bin = Convert.ToString(dec, 2);

How to convert binary to decimal if I have

string bin = "0100101"
int dec = ???

Answer 1

只需查找反向调用Convert.ToInt32(value, fromBase) ：

int dec = Convert.ToInt32(bin, 2);