add text to file c# code example

Example 1: asp.net c# write string to text file

using (StreamWriter writer = new StreamWriter("email.txt", true)) //// true to append data to the file
{
    writer.WriteLine("your_data"); 
}

Example 2: c# append to file

File.AppendAllText(@"c:\path\file.txt", "text content" + Environment.NewLine);