Programming Articles - Page 3158 of 3363

The C# static class cannot be instantiated and can only have only static members. The static class in C# is sealed and cannot contain instance constructors.The following is an example with static class and static members −Example Live Demousing System; public static class Demo {    public static float PI = 3.14f;    public static int calc(int n){return n*n;} } class Program {    public static void Main(string[] args) {       Console.WriteLine("PI: "+Demo.PI);       Console.WriteLine("Square: " + Demo.calc(3));    } }OutputPI: 3.14 Square: 9Above, the static class is −public static class Demo {   ... Read More

C# is a modern, general-purpose, object-oriented programming language developed by Microsoft. C# is designed for Common Language Infrastructure (CLI), which consists of the executable code and runtime environment that allows the use of various high-level languages on different computer platforms and architectures.The following are the major features of C# −Following is the list of few important features of C# −Boolean ConditionsAutomatic Garbage CollectionStandard LibraryAssembly VersioningProperties and EventsDelegates and Events ManagementEasy-to-use GenericsIndexersConditional CompilationSimple MultithreadingLINQ and Lambda ExpressionsIntegration with Windows

IS operatorThe "is" operator in C# checks whether the run-time type of an object is compatible with a given type or not.The following is the syntax −expr is typeHere, expr is the expressiontype is the name of the typeThe following is an example showing the usage of is operator in C# &minis;Example Live Demousing System; class One { } class Two { } public class Demo {    public static void Test(object obj) {       One x;       Two y;       if (obj is One) {          Console.WriteLine("Class One"); ... Read More

Set the following, if the nth number is let’s say num −int n = num- 1; int[] val = new int[n + 1];Then set the default Fibonacci numbers on the first and second position −val[0]= 0; val[1]= 1;Loop through i=2 to i

Use the Any method to find whether the list is empty or not.Set the list −var subjects = new List(); subjects.Add("Maths"); subjects.Add("Java"); subjects.Add("English"); subjects.Add("Science"); subjects.Add("Physics"); subjects.Add("Chemistry");Now set the following condition to check whether the list is empty or not −bool isEmpty = !subjects.Any(); if(isEmpty) {       Console.WriteLine("Empty");    }else {       Console.WriteLine("List is not empty");    }The following is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; public class Demo {    public static void Main(string[] args) {       var subjects = new List();       subjects.Add("Maths");       ... Read More

Firstly, create a list −List list = new List();The string here is “xyz” for which we will find the sublists. While looping we will declare another list, that would generate sublists on every true iteration −for (int i = 1; i < str.Length; i++) {    list.Add(str[i - 1].ToString());    List newlist = new List();    for (int j = 0; j < list.Count; j++) {       string list2 = list[j] + str[i];       newlist.Add(list2);    }    list.AddRange(newlist); }The following is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo ... Read More

To assign same value to multiple variables in a single line, use the = operator −val1 = val2 = 20;The above statement assigns 20 to the variables val1 and val2 as shown in the following code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo {    class MyApplication {       static void Main(string[] args) {          int val1, val2;          val1 = val2 = 20;          Console.WriteLine("Value1 = "+val1);          Console.WriteLine("Value2 = "+val2);       }    } }OutputValue1 = 20 Value2 = 20

To print the numbers divisible by 3 and 5, use the && operator and check two conditions −f (num % 3 == 0 && num % 5 == 0) {}If the above condition is true, that would mean the number is divisible by 3 as well as 5.The following is the complete code −Example Live Demousing System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo {    class MyApplication {       static void Main(string[] args) {          int num;          num = 15;          Console.WriteLine("Number: "+num);          // checking if the number is divisible by 3 and 5          if (num % 3 == 0 && num % 5 == 0) {             Console.WriteLine("Divisible by 3 and 5");          } else {             Console.WriteLine("Not divisible by 3 and 5");          }          Console.ReadLine();       }    } }OutputNumber: 15 Divisible by 3 and 5

Firstly create the two lists −List list1 = new List() {40, 20, 60, 3, 55}; List list2 = new List() {20, 70, 55, 80};To find the common elements, use the Intersect −list1.Intersect(list2)The following is the complete code to find the common elements between the two lists −Example Live Demousing System; using System.Linq; using System.Collections.Generic; namespace Demo {    class Program {       static void Main(string[] args) {          List list1 = new List() {40, 20, 60, 3, 55};          List list2 = new List() {20, 70, 55, 80};          Console.WriteLine("Common elements:");          foreach(int value in list1.Intersect(list2))          Console.WriteLine(value);       }    } }OutputCommon elements: 20 55

The comments that spread more than one line is called multi-line comments −/* The following is a multi-line Comment In C# /*The /*...*/ is ignored by the compiler and it is put to add comments in the program.The following is a sample C# program showing how to add MULTI-line comments −using System; namespace Demo {    class Program {       static void Main(string[] args) {          /* The following is a multi-line          Comment In C#          /*          // printing          Console.WriteLine("Hello World");          Console.ReadKey();       }    } }