using System;
class MainClass {
public static void Main() {
string[] myStrings = {"To", "be", "or", "not","to", "be"};
string myString = String.Join(".", myStrings);
string myString21 = myString.Substring(3);
Console.WriteLine("myString.Substring(3) = " + myString21);
string myString22 = myString.Substring(3, 2);
Console.WriteLine("myString.Substring(3, 2) = " + myString22);
string myString23 = myString.ToUpper();
Console.WriteLine("myString.ToUpper() = " + myString23);
string myString24 = myString.ToLower();
Console.WriteLine("myString.ToLower() = " + myString24);
}
}
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