using System;

public class Welcome3
{
   public static void Main( string[] args )
   {
      Console.WriteLine( "Welcome
to
C#
Programming!" );
   } 
}

           
          

   


using System;

public class Welcome2 {
    public static void Main(string[] args) {
        Console.Write("Welcome to ");
        Console.WriteLine("C# Programming!");
    }
}

           
          

   
 


using System;

class ConsoleAdder {
    public static void Main() {
        int a = 15;
        int b = 744;
        int c = a + b;

        Console.Write("The sum of ");
        Console.Write(a);
        Console.Write(" and ");
        Console.Write(b);
        Console.Write(" equals ");
        Console.WriteLine(c);
        Console.WriteLine("The sum of " + a + " and " + b + " equals " + c);
        Console.WriteLine("The sum of {0} and {1} equals {2}", a, b, c);
    }
}

    

using System;

class MainEntryPoint {
static void Main(string[] args) {
Console.WriteLine(“Type in a string”);
string input;
input = Console.ReadLine();
if (input == “”) {
Console.WriteLine(“You typed in an empty string”);
} else if (input.Length < 5) { Console.WriteLine("The string had less than 5 characters"); } else if (input.Length < 10) { Console.WriteLine("The string had at least 5 but less than 10 characters"); } Console.WriteLine("The string was " + input); } } [/csharp]

   
 

using System;
using System.Collections.Generic;
using System.Text;

class Program {
    static void Main(string[] args) {
        Console.Write("Enter your name: ");
        string s;
        s = Console.ReadLine();
        Console.WriteLine("Hello, {0} ", s);
        Console.Write("Enter your age: ");
        s = Console.ReadLine();
        Console.WriteLine("You are {0} years old", s);

    }
}

    

using System;

class Class1 {
public static void Main(string[] args) {
Console.WriteLine(“Input a series of numbers separated by commas:”);
string input = Console.ReadLine();
char[] cDividers = { ',', ' ' };
string[] segments = input.Split(cDividers);
int nSum = 0;
foreach (string s in segments) {
if (s.Length > 0) {
if (IsAllDigits(s)) {
int num = Int32.Parse(s);
Console.WriteLine(“Next number = {0}”, num);
nSum += num;
}
}
}
Console.WriteLine(“Sum = {0}”, nSum);

}

public static bool IsAllDigits(string sRaw) {
string s = sRaw.Trim();
if (s.Length == 0) {
return false;
}

for (int index = 0; index < s.Length; index++) { if (Char.IsDigit(s[index]) == false) { return false; } } return true; } } [/csharp]

   
 

using System;

public class MainClass {
    public static void Main(string[] args) {
        string sSentence = "";
        for (; ; ) {
            Console.WriteLine("Enter a string");
            string sLine = Console.ReadLine();
            if (IsTerminateString(sLine)) {
                break;
            }
            sSentence = String.Concat(sSentence, sLine);
            Console.WriteLine("
You've entered: {0}", sSentence);
        }
    }
    public static bool IsTerminateString(string source) {
        string[] sTerms = {"EXIT","exit","QUIT","quit"};
        foreach (string sTerm in sTerms) {
            if (String.Compare(source, sTerm) == 0) {
                return true;
            }
        }
        return false;
    }
}