using System;
using System.IO;
using System.Text;
class MainClass
{
public static void Main()
{
using (StreamWriter output = new StreamWriter("output.txt"))
{
string srcString = "Area = \u03A0r^2";
byte[] utf8String = Encoding.UTF8.GetBytes(srcString);
output.WriteLine("UTF-8 Bytes: {0}", BitConverter.ToString(utf8String));
}
}
}
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