Text Coder

        private void button1_Click(object sender, EventArgs e)
        {
            string otext = textBox1.Text;
            string ntext = string.Empty;
            for (int i = 0; i < textBox1.Text.Length; i++)
            {
                int j = char.ConvertToUtf32(otext, i);
                ntext += char.ConvertFromUtf32(255-j );

            }
            textBox1.Text = ntext;
        }

En2Fr

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

            textBox2.Text = textBox1.Text.Trim().ToLower()
                .Replace("a", "ا").Replace("b", "ب").Replace("c", "ک").Replace("d", "د")
                .Replace("e", "ا").Replace("f", "ف").Replace("g", "گ").Replace("h", "ه")
                .Replace("i", "ی").Replace("j", "ج").Replace("k", "ک").Replace("l", "ل")
                .Replace("m", "م").Replace("n", "ن").Replace("o", "و").Replace("p", "پ")
                .Replace("q", "ک").Replace("r", "ر").Replace("s", "س").Replace("t", "ت")
                .Replace("u", "ا").Replace("v", "و").Replace("w", "و").Replace("x", "")
                .Replace("y", "ی").Replace("z", "ز");
               
        }

String Lines Count

using System.Text.RegularExpressions;

public static long LineCount2(string source, bool isFileName)
{
    if (source != null)
    {
        string text = source;
        long numOfLines = 0;
        if (isFileName)
        {
            using (FileStream FS = new FileStream(source, FileMode.Open,
            FileAccess.Read, FileShare.Read))
            {
                using (StreamReader SR = new StreamReader(FS))
                {
                    while (text != null)
                    {
                        text = SR.ReadLine();
                        if (text != null)
                        {
                            ++numOfLines;
                        }
                    }
                }
            }
            return (numOfLines);
        }
        else
        {
            Regex RE = new Regex("\n", RegexOptions.Multiline);
            MatchCollection theMatches = RE.Matches(text);
            return (theMatches.Count + 1);
        }
    }
    else
    {
        // Handle a null source here.
        return (0);
    }
}

Random Text 4

private string GenerateRandomString(int size)
{
    Random r = new Random();
    string legalChars = "1234567890";
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < size; i++)
        sb.Append(legalChars.Substring(r.Next(0, legalChars.Length - 1), 1));
    return sb.ToString();
}

private void button1_Click(object sender, EventArgs e)
{
     MessageBox.Show(GenerateRandomString(6));
}

Random Text 3

private long GenerateId3()
{
    byte[] buffer = Guid.NewGuid().ToByteArray();
    return BitConverter.ToInt64(buffer, 0);
}