c#中字符和字节相互转换

将字符转换为字节：
byte[] byteTime = Encoding.ASCII.GetBytes(DateTime.Now.ToString());

将字节转换为字符：
string sTime = Encoding.ASCII.GetString(bytes,0,bytesRead);

    string strText = "This is an original string";
    System.Text.UTF8Encoding encText = new System.Text.UTF8Encoding();
    byte[] btText;
    btText = encText.GetBytes(strText);
    MessageBox.Show("The total number of encoded bytes is: " + btText.Length.ToString());

vb.net

Dim strText As String = "This is an original string"
Dim encText As New System.Text.UTF8Encoding()
Dim btText() As Byte
btText = encText.GetBytes(strText)
MessageBox.Show("The total number of encoded bytes is: " & btText.Length.ToString())