C# (or C sharp) is a multi-paradigm, general-purpose programming language. It covers strong typing, static typing, declarative, imperatives, lexically scoped, functionally generic, component-oriented, and object-oriented programming disciplines. Developed by Microsoft in 2000, ISO gave it approval in 2003.

C# runs on the .NET Framework, which helps developers build web apps, mobile apps, desktop apps, games, and much more. It is an elementary and modern programming language. More prominently, Forbes listed it in the list of 5 most in-demand coding languages.

So, how you go about hiring C# developer? Well, it is not at all necessary for you to learn the subject in depth. All you need is a bunch of advanced C# interview questions and any best online code editors to test your developer’s skills. Let’s discuss it in detail here.

When you talk about hiring someone for your company and its big projects, you would not want someone with just a fashionable resume. You always search for someone who is practically skilled and finely experienced as well. Experience is one of the crucial things that you should not miss to check in your candidate.

Apart from that, you can also check the following skill sets:

Expertise And Deep Understanding Of C-Sharp

It sounds simple, but it is not that easy to have a firm grip and expertise in this programming language. A candidate who is sound regarding the subject will be able to do your project quite efficiently.

Familiarity With Using .NET & Mono Framework

Simplicity with .NET and Mono frameworks play a vital role in making well-functioning and entirely qualified applications.

Knowledge Of Object-Oriented Programming

C# is an object-oriented programming language, and a C# developer’s potential must require sufficient expertise in object-oriented programming (OOP). They must also be aware of the concept of ‘objects’ that contain information in the form of fields and ‘code’ that contains information in the form of procedures.

Expertise In Different Plan And Architectural Arrangement

Plans and architectural arrangements are connected with code-level similarities. So, your candidate should be skilled in the same.

Understanding Of Famous Web Application Frameworks

Web application frameworks are software frameworks developed to assist the development of web applications like web resources, web services, and web APIs. A C# developer who is clear about different famous web application frameworks means that they have a strong knowledge of the framework and depicts how well-skilled they are in developing the C# based applications.

Capacity To Control Database Schemas

To develop an app, C# developers must create database schemas that represent and strengthen business methods. A database schema is a support structure representing the logical view of the entire database, defining how the data is organized and how they relate to one another.

When hiring tech expertise and developers, studying the candidates’ skill sets will assist you to initially evaluate whether a candidate is suitable for the job or not.

Mainly, the C sharp coding assessments are designed so that experienced professionals can provide critical and targeted responses. This will give an insight to the hiring team on whether the candidate is the best fit for the team or not.

Here is a list of 20 prominent advanced C# questions that you should ask your candidate in the interview.

1. What is the output of the short program below? Explain your answer.
   class Program {
   static String location;
   static DateTime time;
   static void Main() {
   Console.WriteLine(location == null ? "location is null" : location);
   Console.WriteLine(time == null ? "time is null" : time.ToString());
   }
   }
2. What is the difference between continue and break statements in C#?
3. Describe the Async method of C#?
4. Are the comparison of time and null in the if statement below valid or not? Why or why not?
   static DateTime time;
   /* ... */
   if (time == null)
   {
   /* do something */
   }
5. What are dynamic type variables in C#?
6. Is it possible to serialize hashtables?
7. What is the output of the program below? Explain your answer.
   class Program {
   private static string result;
   static void Main() {
   SaySomething();
   Console.WriteLine(result);
   }
   static async Task<string> SaySomething() {
   await Task.Delay(5);
   result = "Hello world!";
   return “Something”;
   }
   }
   
   Also, would the answer change if we were to replace await Task?Delay(5); with Thread.Sleep(5)? Why or why not?
8. What is Managed or Unmanaged Code?
9. Can you explain the concept of inner exception in C#?
10. Is it possible to store mixed data types such as int, string, float, char all in one array?
11. What is the difference between a Struct and a Class in C#?
12. Explain what is Namespaces in C#.
13. Compare structs and classes in C#. What do they have in common? How do they differ?
14. Can you return multiple values from a function in C#? Provide some examples.
15. What is the output of the program below?
    
    public class TestStatic
    {
    public static int TestValue;
    public TestStatic()
    {
    if (TestValue == 0)
    {
    TestValue = 5;
    }
    }
    static TestStatic()
    {
    if (TestValue == 0)
    {
    TestValue = 10;
    }
    }
    public void Print()
    {
    if (TestValue == 5)
    {
    TestValue = 6;
    }
    Console.WriteLine("TestValue : " + TestValue);
    }
    }
    public void Main(string[] args)
    {
    TestStatic t = new TestStatic();
    t.Print();
    }
16. Explain the difference between Task and Thread in .NET
17. How would you implement the Singleton design pattern in C#?
18. What does the following code output?
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    namespace main1
    {
    class Program
    {
    static void Main(string[] args)
    {
    try
    {
    Console.WriteLine("Hello");
    }
    catch (ArgumentNullException)
    {
    Console.WriteLine("A");
    }
    catch (Exception)
    {
    Console.WriteLine("B");
    }
    finally
    {
    Console.WriteLine("C");
    }
    Console.ReadKey();
    }
    }
    }
19. What are the uses of using in C#
20. Write a C# program that accepts a distance in kilometers, converts it into meters, and then displays the result.

These are some of the senior C# developer interview questions to ask your applicant during the interview to test their knowledge about the subject. You can also rely on some of the coding interview tools that lend a platform for coders to test their coding abilities online. Another good practice is to send a C# coding assignment to filter the best candidates.

Following these steps can help you find a perfect fit for your team and a skilled developer for the company.