C# (pronounced as C sharp) is a versatile and powerful programming language developed by Microsoft. It is widely used for building a variety of applications including desktop software web applications games mobile apps cloud services and much more. C# is part of the .NET framework which provides a rich set of libraries and tools to streamline the development process. One of the key features of C# is its object-oriented nature allowing developers to organize code into reusable components. It incorporates modern language features such as LINQ (Language Integrated Query) for efficient data manipulation async/await for asynchronous programming and lambda expressions for concise code. Here's a simple example of a Hello World program in C#: using System; class Program { static void Main() { Console.WriteLine(Hello World!); } } In this code snippet we include the `System` namespace for access to basic types like `Console` which enables us to output text to the console. C# is not only popular for its ease of use and readability but also for its robustness in handling complex tasks. Whether you're a beginner learning to code or a seasoned developer working on intricate projects C# remains a valuable tool in the realm of software development.