How to convert a string to a byte array and convert a byte array to a string + C#

Convert a string to a byte array

string myString = "a test string";
byte[] myByteArray = new byte[myString.Length];
int i = 0;
foreach(char c in InStr.ToCharArray())
{
  myByteArray [i] = (byte)c;
  i++;
}

Convert a byte array to a string

System.Text.Encoding enc = System.Text.Encoding.ASCII;
byte[] myByteArray = enc.GetBytes("a text string);
string myString = enc.GetString(myByteArray );