The increment operator is ++ operator. If used as postfix on a variable, the value of the variable is first returned and then gets incremented by 1. It is called Postfix increment operator. In the same way, the decrement operator works but it decrements by 1.For example,a++;The following is an example showing how to work with postfix operator −Example Live Demousing System; class Program {    static void Main() {       int a, b;       a = 10;       Console.WriteLine(a++);           b = a;       Console.WriteLine(a);       Console.WriteLine(b);    } }Output10 11 11

All preprocessor directives begin with #, and only white-space characters may appear before a preprocessor directive on a line. Preprocessor directives are not statements, so they do not end with a semicolon (;).#ifThe #if directive allows testing a symbol or symbols to see if they evaluate to true.#elseIt allows to create a compound conditional directive, along with #if.#elifIt allows creating a compound conditional directive.#endifThe #endif specifies the end of a conditional directive.The following is an example showing the usage of #if, #elif, #else and #endif directives −Example Live Demo#define One #undef Two using System; namespace Demo {    class ... Read More

Use the Name property to display the name of the current thread in C#.Firstly, use the currentThread property to display information about a thread −Thread thread = Thread.CurrentThread;Now use the thread.Name property to display name of the thread −thread.NameLet us see the complete code show current thread’s name in C# −Example Live Demousing System; using System.Threading; namespace Demo {    class MyClass {       static void Main(string[] args) {          Thread thread = Thread.CurrentThread;          thread.Name = "My Thread";          Console.WriteLine("Thread Name = {0}", thread.Name);          Console.ReadKey();       }    } }OutputThread Name = My Thread

#error directiveThe #error directive allows generating an error from a specific location in your code.Let us see an example −Example Live Demousing System; namespace Demo {    class Program {       public static void Main(string[] args) {          #if (!ONE)          #error ONE is undefined          #endif          Console.WriteLine("Generating a user-defined error!");       }    } }After running the above program, a user-defined error generates −OutputCompilation failed: 1 error(s), 0 warnings error CS1029: #error: 'ONE is undefined'#warning directiveThe #warning directive allows generating a level ... Read More

Use the IPHostEntry.AddressList Property to get IP Address −IPHostEntry myIP = Dns.GetHostEntry(hostName); IPAddress[] address = myIP.AddressList;Try the following code to display IP address −Exampleusing System; using System.Net; class Program {    static void Main() {       String hostName = string.Empty;       hostName = Dns.GetHostName();       Console.WriteLine("Hostname: "+hostName);       IPHostEntry myIP = Dns.GetHostEntry(hostName);       IPAddress[] address = myIP.AddressList;       for (int i = 0; i < address.Length; i++) {          Console.WriteLine("IP Address {1} : ",address[i].ToString());       }       Console.ReadLine();    } }

The Abort() method is used for destroying threads.The runtime aborts the thread by throwing a ThreadAbortException. This exception cannot be caught, the control is sent to the finally block, if any.The following is an example showing how to destroy threads −Example Live Demousing System; using System.Threading; namespace MultithreadingApplication {    class ThreadCreationProgram {       public static void CallToChildThread() {          try {             Console.WriteLine("Child thread starts");             // do some work, like counting to 10             for (int counter = 0; counter

The "var" keyword initializes variables with var support. Just assign whatever value you want for the variable, integer, string, float, etc.Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          var myInt = 5;          var myString = "Amit";          Console.WriteLine("Rank: {0} Name: {1}",myInt,myString);       }    } }OutputRank: 5 Name: AmitWe can also use var in arrays −Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          var myInt = new int[] {65,43,88,56};          foreach(var val in myInt)          Console.WriteLine(val);       }    } }Output65 43 88 56

A 2-dimensional array is a list of one-dimensional arrays. Declare it like the two dimensional array shown below −int [, ] aTwo-dimensional arrays may be initialized by specifying bracketed values for each row.int [, ] a = new int [4, 4] { {0, 1, 2, 3} , {4, 5, 6, 7} , {8, 9, 10, 11} , {12, 13, 14, 15} };The following is an example showing how to work with two-dimensional arrays in C# −Example Live Demousing System; namespace ArrayApplication {    class MyArray {       static void Main(string[] args) {          /* an ... Read More

The increment operator is ++ operator. If used as prefix on a variable, the value of variable gets incremented by 1. After that the value is returned unlike Postfix operator. It is called Prefix increment operator. In the same way the decrement operator works but it decrements by 1.For example, ++a;The following is an example demonstrating Prefix increment operator −Example Live Demousing System; class Program {    static void Main() {       int a, b;       a = 10;       Console.WriteLine(++a);       b = a;       Console.WriteLine(a);       Console.WriteLine(b);    } }Output11 11 11

It handles errors generated from referencing a null object. The Null reference exception occurs when you are looking to access member fields or function types that points to null.Let’s say we have the following null string −string str = null;Now you try to get the length of the null string, then it would cause an exception −If(str.Length == null) {}Above the exception will be thrown. Now let us seen how to prevent the null pointer exception to be thrown −Example Live Demousing System; class Program {    static void Main() {       int[] arr = new int[5] {1, ... Read More