using System;
public class Program
{
public static string removeMiddleChar(string str) {
int length = str.Length;
int middleIndex = length / 2;
return str.Substring(0, middleIndex) + str.Substring(middleIndex + 1);
}
public static void Main(string[] args)
{
string str = "abcde";
str = removeMiddleChar(str);
Console.WriteLine(str);
}
}
/*
run:
abde
*/