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The dynamic data type in C# allows you to store any type of value in a variable. Unlike other data types, type checking for dynamic variables occurs at runtime rather than compile-time, providing flexibility but requiring careful handling to avoid runtime errors. Syntax Following is the syntax for declaring a dynamic variable − dynamic = value; Basic Dynamic Variable Declaration Example using System; class Program { public static void Main() { dynamic val1 = 100; ... Read More
The private access specifier in C# allows a class to hide its member variables and member functions from other functions and objects. Only methods of the same class can access its private members. Even an instance of a class cannot access its private members directly from outside the class. Syntax Following is the syntax for declaring a private variable − private dataType variableName; For example − private double length; private int count; private string name; Key Rules of Private Variables Private members can only be accessed within ... Read More
A palindrome is a string that reads the same forwards and backwards, such as "Level", "madam", or "racecar". In C#, there are several ways to check if a string is a palindrome. Using Array.Reverse() Method The simplest approach is to reverse the string and compare it with the original. First, convert the string to a character array − char[] ch = str.ToCharArray(); Then reverse the array using Array.Reverse() − Array.Reverse(ch); Finally, compare the reversed string with the original using case-insensitive comparison − bool res = str.Equals(rev, StringComparison.OrdinalIgnoreCase); ... Read More
Merge Sort is a sorting algorithm that uses the divide and conquer method. It divides the array into two halves, recursively sorts each half, and then merges them back together in sorted order. This process continues until the entire array is sorted. How Merge Sort Works Merge Sort follows these steps − Divide: Split the array into two halves at the middle point Conquer: Recursively sort both halves Merge: Combine the two sorted halves into a single sorted array Merge Sort Divide and Conquer ... Read More
The Byte.Equals(Object) method in C# returns a value indicating whether this instance is equal to a specified object. This method compares the current byte instance with another object and returns true if they are equal, false otherwise. Syntax Following is the syntax − public override bool Equals (object obj); Parameters obj − An object to compare with this instance, or null. Return Value Returns true if obj is a byte instance and equals the value of this instance; otherwise, false. Example Let us now see an example ... Read More
The Decimal.Remainder() method in C# is used to calculate the remainder after dividing two Decimal values. This method performs the same operation as the modulus operator (%) but is specifically designed for decimal precision calculations. Syntax Following is the syntax − public static decimal Remainder(decimal val1, decimal val2); Parameters val1 − The dividend (the number to be divided). val2 − The divisor (the number by which to divide). Return Value Returns a decimal value representing the remainder after dividing val1 by val2. Division Operation: ... Read More
A List in C# is a generic collection that stores elements in a resizable array. You can declare and initialize a List in several ways, depending on whether you want to add elements immediately or start with an empty collection. Syntax Following is the basic syntax for declaring a List − List listName = new List(); Following is the syntax for initializing a List with values − List listName = new List() { value1, value2, value3 }; Empty List Declaration ... Read More
An optional property in a C# class is a property that can have a null value without causing runtime errors. Properties whose CLR types cannot hold null values (like value types) cannot be configured as optional unless they are made nullable using the ? operator. Optional properties are commonly implemented using nullable reference types, default values, or custom attributes to indicate that the property is not required to have a value. Syntax Following is the syntax for declaring nullable properties − public string? PropertyName { get; set; } // Nullable reference type ... Read More
In C#, you can extract all the keys from a Dictionary as a List using the Keys property. This is useful when you need to work with dictionary keys as a separate collection or perform operations like sorting, filtering, or iteration. Syntax Following is the syntax to get keys from a Dictionary − Dictionary dictionary = new Dictionary(); List keys = new List(dictionary.Keys); You can also use LINQ to convert keys to a List − List keys = dictionary.Keys.ToList(); Using Dictionary.Keys Property The Keys property returns a collection of ... Read More
An abstract property in C# is a property declared in an abstract class without implementation. The derived classes must provide the actual implementation of the property accessor (get, set, or both). Abstract properties enforce a contract that ensures all derived classes implement the required property. Abstract properties are useful when you want to define a common structure across related classes but need each class to calculate or store the property value differently. Syntax Following is the syntax for declaring an abstract property − public abstract class ClassName { public abstract DataType PropertyName ... Read More