The Main() method serves as the entry point where the program begins execution. Every C# console application requires a Main() method, making it essential for launching the application.

In C#, the 'int' keyword is used to declare an integer variable. The statement 'int myNumber = 10;' follows proper C# syntax and is the correct form.

A semicolon (;) terminates a statement in C#. It tells the compiler where one statement ends and the next begins, which is a fundamental part of C# syntax.

Namespaces are used to organize code by grouping related classes, interfaces, and other types. They help prevent naming conflicts and improve code maintainability.

The 'private' modifier limits access to the member within its own class. This is a key feature of encapsulation in object-oriented programming, ensuring internal details are hidden.

The do-while loop executes its block of code before evaluating the condition, ensuring that the block runs at least once. Other loop constructs check the condition first, which might prevent execution if the condition is false initially.

The 'base' keyword in C# is used within a derived class to call a constructor of its base class. This ensures that the inherited members are properly initialized.

The try-catch block is specifically designed to handle exceptions in C#. It allows developers to catch and manage errors that occur during the execution of a program.

A static method is associated with the class rather than any particular object instance. This makes it possible to call the method without creating an instance of the class.

The bool data type is specifically designed to hold Boolean values, true or false. It is the ideal choice when working with conditions and logical operations in C#.

The using directive simplifies code by allowing developers to use classes from a namespace without having to specify the full namespace path every time. This enhances code readability and maintainability.

In C#, the 'interface' keyword is used to define a contract that classes can implement. This supports polymorphism and multiple inheritance of behavior.

The foreach loop provides a simple syntax for iterating over arrays or collections. It automatically traverses the collection, making code cleaner and reducing the chance of errors in index management.

Encapsulation is the object‑oriented principle of combining data and the methods that operate on that data into a single unit, typically a class. This helps hide internal implementation details and protects the integrity of the data.

The 'internal' modifier restricts access to the current assembly, meaning that other assemblies cannot access the member. This is useful for encapsulating functionality within a defined boundary.

The 'ref' keyword passes an argument by reference, meaning that the called method can modify the original variable. This technique is useful when you need the method to update the value of a parameter.

Delegates in C# act as type‑safe function pointers, allowing methods to be passed as parameters. They are central to implementing event handling and callback methods.

Lambda expressions offer a concise way to represent anonymous methods. They can capture variables from their surrounding scope, making them extremely useful in various programming scenarios, such as event handling and LINQ queries.

The 'params' keyword allows a method to accept a variable number of arguments as a single logical parameter, typically handled as an array. This feature is particularly useful when the number of inputs is not predetermined.

The 'sealed' keyword, when applied to a method, prevents it from being further overridden by any subclasses. This is useful for enforcing a specific implementation when inheritance hierarchies are involved.