在这里你去：

 公共静态的byte [] ConvertToByteArray（字符串str，编码编码）
{
    返回encoding.GetBytes（STR）;
}公共静态字符串ToBinary（字节[]数据）
{
    返回的string.join（，data.Select（BYT = GT; Convert.ToString（BYT，2）.PadLeft（8，'0'）））;
}//使用任何类型的编码，你喜欢的。
VAR binaryString = ToBinary（ConvertToByteArray（欢迎你，世界！，Encoding.ASCII））;
 

I have a function to convert string to hex as this,

public static string ConvertToHex(string asciiString)
{
    string hex = "";
    foreach (char c in asciiString)
    {
         int tmp = c;
         hex += String.Format("{0:x2}", (uint)System.Convert.ToUInt32(tmp.ToString()));
    }
    return hex;
}

Could you please help me write another string to Binary function based on my sample function?

public static string ConvertToBin(string asciiString)
{
    string bin = "";
    foreach (char c in asciiString)
    {
        int tmp = c;
        bin += String.Format("{0:x2}", (uint)System.Convert.????(tmp.ToString()));
    }
    return bin;
}

Here you go:

public static byte[] ConvertToByteArray(string str, Encoding encoding)
{
    return encoding.GetBytes(str);
}

public static String ToBinary(Byte[] data)
{
    return string.Join(" ", data.Select(byt => Convert.ToString(byt, 2).PadLeft(8, '0')));
}

// Use any sort of encoding you like. 
var binaryString = ToBinary(ConvertToByteArray("Welcome, World!", Encoding.ASCII));