using System;
class Program
{
static void Main() {
char ch = 'D';
if (Char.IsLetter(ch)) {
if (Char.IsLower(ch)) {
Console.WriteLine("if (Char.IsLetter(ch)) if (Char.IsLower(ch))");
}
else {
Console.WriteLine("else uppercase char");
}
}
else {
Console.WriteLine("Not alphabetic char");
}
}
}
/*
run:
else uppercase char
*/