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Articles by karthikeya Boyini
Page 19 of 142
C# Single() Method
The Single() method in C# returns the only element of a sequence. It throws an exception if the sequence is empty or contains more than one element, making it useful when you expect exactly one element. The Single() method is available in both LINQ to Objects and LINQ to Entities through the System.Linq namespace. Syntax Following is the syntax for the Single() method − public static TSource Single(this IEnumerable source); public static TSource Single(this IEnumerable source, Func predicate); Parameters source − The IEnumerable to return the single element from. predicate − ...
Read MoreC# Multiple Local Variable Declarations
In C#, you can declare and initialize multiple local variables of the same type in a single statement using the comma operator. This provides a concise way to declare several variables at once, making your code more readable and reducing repetition. Syntax Following is the syntax for declaring multiple local variables of the same type − dataType variable1 = value1, variable2 = value2, variable3 = value3; You can also declare variables without initialization − dataType variable1, variable2, variable3; Basic Multiple Variable Declaration The following example demonstrates declaring four integer ...
Read MoreWhat is the maximum possible value of an integer in C# ?
The maximum possible value of a 32-bit signed integer (int) in C# is 2, 147, 483, 647. This value is also available through the constant int.MaxValue. However, C# provides several integer types with different ranges and maximum values. Integer Types and Their Maximum Values C# offers multiple integer data types, each with different storage sizes and value ranges − Type Size Range Maximum Value sbyte 8-bit signed -128 to 127 127 byte 8-bit unsigned 0 to 255 255 short 16-bit signed -32, 768 to 32, 767 ...
Read MoreTry/catch/finally/throw keywords in C#
Exception handling in C# is implemented using four key keywords that work together to manage runtime errors gracefully. The try block contains code that might throw an exception, catch blocks handle specific exceptions, finally executes cleanup code regardless of whether an exception occurs, and throw is used to raise exceptions manually. Syntax Following is the basic syntax for exception handling in C# − try { // code that might throw an exception } catch (SpecificExceptionType ex) { // handle specific exception } catch (Exception ex) { // ...
Read MoreToDictionary method in C#
The ToDictionary method is a LINQ extension method in C# that converts any collection into a Dictionary. It allows you to specify how to extract the key and value from each element in the source collection. Syntax Following is the basic syntax for the ToDictionary method − source.ToDictionary(keySelector) source.ToDictionary(keySelector, valueSelector) source.ToDictionary(keySelector, valueSelector, comparer) Parameters keySelector − A function to extract the key from each element. valueSelector − A function to extract the value from each element (optional). comparer − An equality comparer to compare keys (optional). ...
Read MoreC# Program to check if a number is prime or not
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. To check if a number is prime in C#, we need to verify that it has exactly two divisors. Algorithm To determine if a number is prime, we use a for loop to check all numbers from 1 to the given number. We count how many divisors exist by checking if the remainder is zero when dividing the number by each potential divisor − for (int i = 1; i
Read MoreC# Program to count the number of lines in a file
Counting the number of lines in a file is a common task in C# programming. This can be accomplished using several methods from the System.IO namespace. The most straightforward approach is to use the File.ReadAllLines() method combined with the Length property. Using File.ReadAllLines() Method The File.ReadAllLines() method reads all lines from a file into a string array, and then we can use the Length property to count the total number of lines − Example using System; using System.IO; public class Program { public static void Main() { ...
Read MoreC# Program to Check Whether the Entered Number is an Armstrong Number or Not
An Armstrong number (also called a narcissistic number) is a number that equals the sum of its digits raised to the power of the number of digits. For a 3-digit number, each digit is cubed and summed. For example, 153 is an Armstrong number because − 1³ + 5³ + 3³ = 1 + 125 + 27 = 153 Armstrong Number Check Process 153 Original Number 1³ + 5³ + 3³ Sum of Cubes ...
Read MoreWhat is method hiding in C#?
Method hiding (also known as shadowing) in C# occurs when a derived class defines a method with the same name as a method in its base class, but without using the override keyword. The child class creates its own version of the method that hides the parent class method rather than overriding it. Method hiding uses the new keyword to explicitly indicate that the method is intended to hide the base class method. This is different from method overriding, which uses override and creates polymorphic behavior. Syntax Following is the syntax for method hiding using the new ...
Read MoreC# Program to check whether a directory exists or not
The Directory.Exists method in C# is used to check whether a specified directory exists on the file system. This method returns a boolean value − true if the directory exists, and false if it does not. This functionality is essential for file system operations where you need to verify directory existence before performing operations like reading files, creating subdirectories, or moving content. Syntax Following is the syntax for the Directory.Exists method − public static bool Exists(string path) Parameters path − A string representing the path to the directory to check. ...
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