A delegate in C# is a reference to the method. A delegate is a reference type variable that holds the reference to a method. The reference can be changed at runtime.Delegates are especially used for implementing events and the call-back methods. All delegates are implicitly derived from the System.Delegate class.Let ... Read More

The #undef directive allows you to undefine a symbol. The following is the syntax −#undef SYMBOLFor example, #undef OneIt evaluates to false when used along with #if directive. Let us see an example −Example Live Demo#define One #undef Two using System; namespace Demo {    class Program {   ... 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 ... Read More

A pointer is a variable whose value is the address of another variable i.e., the direct address of the memory location. Similar to any variable or constant, you must declare a pointer before you can use it to store any variable address.The syntax of a pointer is −type *var-name;The following ... Read More

Ternary operator is a Conditional operator in C#. It takes three arguments and evaluates a Boolean expression.For example −b = (a == 1) ? 20 : 30;Above, if the first operand evaluates to true (1), the second operand is evaluated. If the first operand evaluates to false (0), the third ... Read More

Firstly, set the enum −public enum Vehicle { Car, Bus, Truck }Now use typecasting to cast an enum to int −int a = (int)Vehicle.Car;The following is the complete code to cast an enum to int −Example Live Demousing System; public class Demo {    public enum Vehicle { Car, Bus, ... Read More

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 ... 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());   ... Read More

The sizeof() datatype returns the size of a data type. Let’s say you need to find the size of int datatype −sizeof(int);For double datatype −sizeof(double);Let us see the complete example to find the size of various datatypes −Example Live Demousing System; namespace Demo {    class Program { ... Read More

Use the new keyword to create an instance of the array −int [] a = new int[5];The new operator is used to create an object or instantiate an object. Here in the example, an object is created for the class using the new −Example Live Demousing System; namespace CalculatorApplication { ... Read More