1:WAP to print hello in C#using System; class myclass{ public static void Main(){Console.WriteLine("hello");}}

2:WAP for command line argumentusing System;

class test{ public static void Main(String []ar)

{ Console.WriteLine("welcome"); Console.WriteLine(" "+ar[0]); Console.WriteLine(" "+ar[1]);}}

3:WAP for taking input through the keyboardusing System;class test{ public static void Main() {Console.WriteLine("Enter your name");string name=Console.ReadLine();Console.WriteLine("Hello"+name); }}

4:WAP for using multiple main in a single programusing System;class first{ public static void Main(){Console.WriteLine("This is first main");}

}class second{public static void Main() {Console.WriteLine("this is second main"); }}

5:Multi-file programusing System;class first{Public void disp() {Console.WriteLine("Enter your name");string str=Console.ReadLine();Console.WriteLine("Welcome"+str); } }using System;class second{ public static void Main(){ first t1=new first(); t1.disp(); Console.WriteLine("thank you");}}

6:WAP for swapping numbersusing System;class swap{public static void Main() { int a=15; int b=10; Console.WriteLine("The value of a before swapping ="+a); Console.WriteLine("the value of b before swapping="+b); a=a+b; b=a-b; a=a-b; Console.WriteLine("after swapping the value of a="+a); Console.WriteLine("after swapping the value of b="+b); }}

7:Initialization of variables ion C#using System;class first{ public static void Main(){ test t1=new test(); t1.b=1; test t2=new test(); t2.b=2; test.a=4; t1.show(); t2.show();}}class test{ public static int a; public int b; public void show() { Console.WriteLine("value of a={0} value of b={1}",a,b); }}

8:WAP to find a Armstrong numberusing System;class arm{ public static void Main(){int n,n1,rem,num=0;Console.WriteLine("enter the number");n=int.Parse(Console.ReadLine());n1=n;while(n1!=0)

{ rem=n1%10; num+=rem*rem*rem; n1/=10;

}if(num==n) Console.WriteLine("Number Is armstrong number");else Console.WriteLine("number is not armsrtong");}}

9:WAP to find sum of digits of a numberusing System;class digit{ public static void Main(){ Console.WriteLine("Enter the number"); int number=int.Parse(Console.ReadLine()); int sum = 0; int input = number; while (input != 0) { int lastdigit = input % 10; sum += lastdigit; input /= 10; }

Console.WriteLine("Sum of digit is"+sum);}}

10:WAP to print Fibonacci series using System;class fab{ public static void Main(){ int k,r; int i=0,j=1,f; Console.WriteLine("Enter the range"); r=int.Parse(Console.ReadLine()); for(k=2;k