example method save text to array visual c#

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: List string to file C#

string[] lines = { "First line", "Second line", "Third line" };
System.IO.File.WriteAllLines(@"C:\Users\Public\TestFolder\WriteLines.txt", lines);
lines = { "Fourth line", "Fith line" };
System.IO.File.AppendAllLines(@"C:\Users\Public\TestFolder\WriteLines.txt", lines);