C# is the most popular and widely used programming language for developing web applications, desktop applications, and mobile apps. This article contains the top 20 C# interview questions and answers, in order to prepare you for the interview.

What is C#?
C# pronounced as "See Sharp". It is an object-oriented programing language developed by Microsoft, which runs under the .NET platform. Its syntaxes are similar to C++ or Java. The most recent version of C# is 7.3 which is introduced with Visual Studio 2017 update 15.7. C# is widely used for developing web applications, desktop applications, mobile apps, and games, etc. Now, C# can be run on Mac, Linux/Unix, and Windows using .NET Core.