Format DateTime using String.Format method.Let us see an example −Exampleusing System; static class Demo {    static void Main() {       DateTime d = new DateTime(2018, 2, 8, 12, 7, 7, 123);       Console.WriteLine(String.Format("{0:y yy yyy yyyy}", d));       Console.WriteLine(String.Format("{0:M MM MMM ... Read More

ArrayList is a non-generic type of collection in C# that dynamically resizes.Let us see how to initialize ArrayList in C# −ArrayList arr= new ArrayList();Add an item to an Array List −ArrayList arr1 = new ArrayList(); arr1.Add(30); arr1.Add(70);Let us see the complete example to implement ArrayList in C#. Here we have ... Read More

Java has a final keyword, but C# does not have its implementation. Use the sealed or readonly keyword in C# for the same implementation.The readonly would allow the variables to be assigned a value only once. A field marked "read-only", can only be set once during the construction of an ... Read More

ClassClass is a blueprint for a data type. A class definition starts with the keyword class followed by the class name.StructA structure is a value type data type. It helps you to make a single variable hold related data of various data types. The struct keyword is used for creating ... Read More

Numeric promotion is the promotion of smaller types to larger types like short to int.In the below example, we have seen a numeric promotion in Conditional Expression.The short types are automatically promoted to larger type int.Exampleusing System; class Program {    static void Main() {       short ... Read More

Arrays were a pointer to an address in memory of the index. This index was the 1st element of the array. Here, the index is like an offset and the concept even before C language originated.Let’s say your array elements begins from 0Xff000 and has 5 elements like {35, 23, ... Read More

To set final for a local variable, use the read-only keyword in C#, since the implementation of the final keyword is not possible.The readonly would allow the variables to be assigned a value only once. A field marked "read-only", can only be set once during the construction of an object. ... Read More

Multi-dimensional arrayMulti-dimensional arrays are also called rectangular array. You can define a 3-dimensional array of integer as −int [ , , ] val;Let us see how to define a two-dimensional array.int[, ] val = new[3, 3] Jagged arrayA Jagged array is an array of arrays. To access an element from ... Read More

To copy or clone a C# list, firstly set a list −List < string > list1 = new List < string > (); list1.Add("One"); list1.Add("Two"); list1.Add("Three"); list1.Add("Four");Now declare a string array and use the CopyTo() method to copy.string[] arr = new string[20]; list1.CopyTo(arr);Let us see the complete code to copy ... Read More

The following is the difference between implicit and explicit type conversion −Implicit Type ConversionThese conversions are performed by C# in a type-safe manner.To understand the concept, let us implicitly convert int to long.int val1 = 11000; int val2 = 35600; long sum; sum = val1 + val2;Above, we have ... Read More