Server Side Programming Articles - Page 2516 of 2650

String literals or constants are enclosed in double quotes "" or with @"". A string contains characters that are similar to character literals: plain characters, escape sequences, and universal characters.Here are some examples of String Literals −“Hi, User" "You’re Welcome, \The following is an example showing the usage of string literals −Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          // string          string str1 ="Hello, World";          Console.WriteLine(str1);          // Multi-line string          string str2 = @"Welcome,          Hope you are doing great!";          Console.WriteLine(str2);       }    } }OutputHello, World Welcome, Hope you are doing great!

The using statement is used to set one or more than one resource. These resources are executed and the resource is released. The statement is also used with database operations.The main goal is to manage resources and release all the resources automatically.Let us see an example wherein “A” would print first since the SystemResource is allocated first.Example Live Demousing System; using System.Text; class Demo {    static void Main() {       using (SystemResource res = new SystemResource()) {          Console.WriteLine("A");       }       Console.WriteLine("B");    } } class SystemResource : IDisposable {    public void Dispose() {       Console.WriteLine("C");    } }OutputA C B

Circular reference occurs when two or more interdependent resources cause lock condition. This makes the resource unusable.To handle the problem of circular references in C#, you should use garbage collection. It detects and collects circular references. The garbage collector begins with local and static and it marks each object that can be reached through their children.Through this, you can handle the issues with circular references.Let’s say the following classes is in circular reference. Here both of them depends on each other −public class A {    B Two; } public class B {    A one; }To solve the ... Read More

The Array.SyncRoot property is used to get an object that can be used to synchronize access to the Array. The classes that have arrays can also use the SyncRoot property to implement their own synchronization.Enumerating through a collection is not a thread safe procedure. The other threads may modify the collection even when the collection is synchronized. This would eventually cause the enumerator to throw an exception. For this, you need to lock the collection.Let us see an example to work with Array.SyncRoot property −Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Program {    static void Main() {   ... Read More

C# is a simple, modern, general-purpose, object-oriented programming language developed by Microsoft within its .NET initiative led by Anders Hejlsberg.C++ is a middle-level programming language developed by Bjarne Stroustrup starting in 1979 at Bell Labs. C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.The following are some of the features of C++ missing in C# −In C#, Multiple Inheritance is not possible, whereas C++ can easily implement Multiple Inheritance.In C++, you need to manage memory manually and must allocate and deallocate memory for your objects.C++ can create standalone applications, whereas C# ... Read More

HashSet in C# eliminates duplicate strings or elements in an array.In C#, it is an optimized set collection.Let us see an example to remove duplicate strings using C# HashSet. Here, we have duplicate elements −Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Program {    static void Main() {       string[] arr1 = {          "bus",          "truck",          "bus",          "car",          "truck"       };       Console.WriteLine(string.Join(", ", arr1));       // HashSet ... Read More

Integer LiteralsAn integer literal can be a decimal, or hexadecimal constant. A prefix specifies the base or radix: 0x or 0X for hexadecimal, and there is no prefix id for decimal. Here are some of the examples of integer literals −10 // int 18u // unsigned intLet’s use the above literal while declaring and initializing a variable −// int int a =10;We will now print the values −Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          // int          int a =200;   ... Read More

Console.ReadKey(); is for the VS.NET Users. This makes the program wait for a key press and it prevents the screen from running and closing quickly when the program is launched from Visual Studio .NET.A common use of the ReadKey() method is that you can halt the program execution. This could be done until a key is pressed by the user.Let us see an example −Example Live Demousing System; public class Demo {    public static void Main() {       DateTime date = DateTime.Now;       TimeZoneInfo timeZone = TimeZoneInfo.Local;       Console.WriteLine("Time Zone = {0}", timeZone.IsDaylightSavingTime(date) ... Read More

To determine if a string has unique characters or not, firstly check a word in the string with the next word −for (int j = i + 1; j < val.Length; j++) {    if (val[i] == val[j]) }If you find a match, that would mean the string do not have unique characters.If you are unable to find a match, then the string has all unique characters.In case of a match, return false i.e. unique characters not found −for (int j = i + 1; j < val.Length; j++) {    if (val[i] == val[j])    return false; }

The Array.IsSynchronized property in C gets a value indicating whether access to the Array is synchronized.The IsSynchronized property is implemented by Arrays because it is needed by the System.Collections.ICollection interface. Classes using arrays can also implement own synchronization using the SyncRoot property.The following is the syntax −public bool IsSynchronized { get; }The Array.IsSynchronized property implementation is the same like the SyncRoot property −Example Live Demousing System; using System.Collections.Generic; using System.Linq; class Program {    static void Main() {       Array arr = new int[] { 2, 1, 9, 4, 8, 6,8 };       lock(arr.SyncRoot) {          foreach (Object val in arr)          Console.WriteLine(val);       }    } }Output2 1 9 4 8 6 8