Convert string to binary and binary to string in C#

String to binary method:

public static string StringToBinary(string data)
{
    StringBuilder sb = new StringBuilder();
 
    foreach (char c in data.ToCharArray())
    {
        sb.Append(Convert.ToString(c, 2).PadLeft(8, '0'));
    }
    return sb.ToString();
}

Binary to string method:

public static string BinaryToString(string data)
{
    List<Byte> byteList = new List<Byte>();
 
    for (int i = 0; i < data.Length; i += 8)
    {
        byteList.Add(Convert.ToByte(data.Substring(i, 8), 2));
    }
    return Encoding.ASCII.GetString(byteList.ToArray());
}