Top 30 C# Interview Questions and Answers

Constants are compile-time constants, while readonly variables can be assigned a value at runtime but cannot be changed after initialization.

• Constants are declared using the 'const' keyword, while readonly variables are declared using the 'readonly' ...read more

I was rated highly in C# language due to my strong understanding of object-oriented programming principles and experience with various C# frameworks.

• Strong understanding of object-oriented programming principles

• Experience with various C# frameworks s...read more

Extension methods allow adding functionality to existing types without modifying them.

• Extension methods are defined in a static class.

• They must be marked with the 'this' keyword before the first parameter.

• They can be called on instances of the extend...read more

C# 9.0 introduces new features like records, init-only setters, and top-level statements.

• Records provide a concise syntax for defining immutable types.

• Init-only setters allow setting properties only during object initialization.

• Top-level statements a...read more

Var keyword is used for implicitly typed local variables, while dynamic keyword is used for runtime type checking.

• Var is resolved at compile time, while dynamic is resolved at runtime

• Var is strongly typed, while dynamic is not

• Var is used for local va...read more

Interface in C# is a reference type that defines a contract for classes to implement certain methods and properties.

• Interfaces cannot have implementation, only method signatures and properties.

• Classes can implement multiple interfaces in C#.

• Interface...read more