using System;namespace OperatorsAppl {class Program {static void Main(string[] args) {int a = 20;int b = 10;

using System;namespace OperatorsAppl {class Program {static void Main(string[] args) {int a = 21;int c;

using System;namespace OperatorsAppl {class Program {static void Main(string[] args) {int a = 60;/* 60 = 0011 1100 */

using System;namespace DecisionMaking {class Program {static void Main(string[] args) {int a = 100;int b = 200;

using System;namespace DecisionMaking {class Program {static void Main(string[] args) {//* local variable definition */

using System;namespace DecisionMaking {class Program {static void Main(string[] args) {/* local variable definition */

using System;namespace DecisionMaking {class Program {static void Main(string[] args) {/* local variable definition */

using System;namespace Loops {class Program {static void Main(string[] args) {/* for loop execution */

using System;namespace Loops {class Program {static void Main(string[] args) {/* local variable definition */

using System;namespace Loops {class Program {static void Main(string[] args) {/* local variable definition */

using System;namespace HelloWorldApplication {class HelloWorld {static void Main(string[] args) {/* my first program in C# */

using System;namespace CalculatorApplication {class NumberManipulator {public int FindMax(int num1, int num2) {

using System;namespace RectangleApplication {class Rectangle {//member variablesinternal double length;

namespace RectangleApplication {class Rectangle {//member variablespublic double length;public double width;

using System;namespace TypeConversionApplication {class StringConversion {static void Main(string[] args) {

using System;namespace TypeConversionApplication {class ExplicitConversion {static void Main(string[] args) {

using System;namespace RectangleApplication {class Rectangle {// member variablesdouble length;double width;

using System;namespace EscapeChar {class Program {static void Main(string[] args) {Console.WriteLine(Hello\\tWorld\\n\\n);

using System;namespace DeclaringConstants {class Program {static void Main(string[] args) {const double pi = 3.14159;

using System;class Program {static void Main(string[] args) {int a = 21;int b = 10;if (a == b) {Console.WriteLine(Line 1 - a is equal to b);