A simple program that will ask the user to give a string and then the program will uppercase the consonants in a given string using C# programming language.
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Program Listing
Program.cs
using System;
public class Program
{
public static void Main()
{
Console.Write("\n");
Console.Write("\tUppercase Consonants in C#");
Console.Write("\n\n");
Console.Write("\tEnter a string: ");
string input = Console.ReadLine();
Console.Write("\n\n");
Console.Write("\tGiven String : " + input);
Console.Write("\n\n");
Console.Write("\tThe Result: ");
foreach (char ch in input)
{
PrintChar(ch);
}
Console.Write("\n\n");
Console.Write("\tEnd of Program");
Console.Write("\n");
Console.ReadKey();
}
public static void PrintChar(char ch)
{
ConsoleColor old_color = Console.ForegroundColor;
if (ch.IsConsonant())
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.Write(Char.ToUpper(ch));
Console.ForegroundColor = old_color;
}
else
Console.Write(ch);
}
}
Characterextensions.cs
using System; public static class CharacterExtensions { public static bool IsConsonant(this char ch) { const string consonants = "BCDFGHJKLMNPQRSTVWXYZ"; return consonants.IndexOf(Char.ToUpper(ch)) != -1; } }