✅ StreamWriter not writing to file

// How to read and write to file in C#
string filePath = Path.GetFullPath("sample.txt");

try
{
    var sr = new StreamReader(filePath);
    var line = sr.ReadLine();
    Console.WriteLine(line);
    sr.Close();
}
catch (Exception e)
{
    Console.WriteLine(e.Message);
}

try
{
    using (var sw = new StreamWriter(filePath, true, Encoding.Unicode))
    {
        sw.WriteLine("Just a new line");
        sw.WriteLine("Just a new line 2");
    }
    
}
catch (Exception e)
{
    Console.WriteLine($"Processing failed: {e.Message}");
}
finally
{
    Console.WriteLine("Finally block executed");
}