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OOP Concepts C#

Six Important C# Interview Questions & OOP Concepts 1. Encapsulation 2. Abstraction 3. Inheritance  4. Polymorphism 2) What is Encapsulation? How can we achieve?  A) Wrapping STATES and BEHAVIOURS are called as ENCAPSULATION. Or Binding VARIABLES and METHODS is called as ENCAPSULATION. By implementing class we can achieve ENCAPSULATION. 3) What is abstraction? How can we achieve this?  A) Abstraction means HIDING.                           Abstractions are 2 types.  1) data abstraction:-   Hiding unwanted data is called as data abstraction 2) Method abstraction:- Invoking the required method and hiding unwanted method is called as method abstraction. With the help of FUNCTION OVERLOADING, we can achieve Method ABSTRACTION. 4) What is Inheritance? Types of Inheritance?  A) Inheriting or deriving members from one class to another class is called as INHERITANCE...
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String Program in C#

using System; using System.Linq; 1)Reverse Name String  in C# String Name="Sudam"; int Len=Name.Length-1; while(Len>=0) { Console.Write(Name[Len]); Len--; } ----------------------------------------- Output --madus ----------------------------------------- 2)Reverse Words of a String in C# string s = "I Name Is Sudam"; string[] a = s.Split(' '); int temp= a.Length - 1; while (temp >= 0) {     Console.Write(a[temp] + ' ');     temp--; } ------------------------------------------ Output --Sudam Is Name I ---------------------------------------- 3) How to Fine count how many double letters are in a string? int doubleLetters = 0; string characters = "Hello"; for (int i = 0; i < characters.Length - 1; i++) {     if (characters[i] == characters[i + 1])     {         doubleLetters++;         i++;     }     Console.WriteLine(doubleLetters); } -----------------------------------------...
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CSV using XmlNode

 To create a CSV from an XmlNode in C#, you can follow these steps: 1. Parse the XML structure using XmlNode. 2. Extract the data you need from child nodes. 3. Write the CSV content using a StringBuilder or directly with StreamWriter. Here's a sample code snippet: using System; using System.IO; using System.Text; using System.Xml; public class XmlToCsvConverter {     public static void ConvertXmlNodeToCsv(XmlNode rootNode, string csvFilePath)     {         StringBuilder csvContent = new StringBuilder();         // Assuming all child nodes have the same structure         // Add header         if (rootNode.HasChildNodes)         {             XmlNode firstRow = rootNode.FirstChild;             for (int i = 0; i < firstRow.ChildNodes.Count; i++)             {     ...
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Controller_Model. cs

Controller using Microsoft.AspNetCore.Http; using Microsoft.AspNetCore.Mvc; using NZWalks.API.Helper; using NZWalks.API.Models; using System.Net; namespace NZWalks.API.Controllers {     [ApiController]     [Route("api/[controller]")]     public class ConnectionController : ControllerBase     {         private readonly IConfiguration _configuration;         public ConnectionController(IConfiguration configuration)         {             _configuration = configuration;         }         [HttpGet("validate")]         public IActionResult ValidateAllConnections()         {             var hostname = Dns.GetHostName();             var connectionStrings = new List<ConnectionItem>();           ...
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