C# interview questions covering c# & .net fundamentals.
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C# is a modern, object-oriented, strongly typed programming language developed by Microsoft. It is widely used with .NET to build web applications, REST APIs, desktop applications, cloud services, mobile applications, games, and enterprise software.
.NET is a development platform that provides the runtime, libraries, frameworks, and development tools needed to build and execute applications.
CLR stands for Common Language Runtime. It is the execution engine of .NET and manages the execution of .NET applications.
Managed code is code that executes under the control of the .NET CLR. The runtime manages important services such as memory allocation, garbage collection, exception handling, type checking, and thread management.
Value types contain their data directly, while reference types hold a reference to an object.
The stack is primarily associated with method execution frames, parameters, and local variables. The managed heap is used for dynamically allocated objects.
Boxing is the conversion of a value type to object or to an interface type implemented by that value type. It involves creating an object representation of the value.
var uses compile-time type inference. The compiler determines the actual type from the assigned expression, and the variable remains strongly typed.
A const field represents a compile-time constant. Its value must be known at compile time and cannot be changed.
Both can compare values, but the exact behavior depends on the type and how equality is implemented.