C#

What is yield in C#?

• yield return allows you to return elements from a collection one at a time, enabling lazy evaluation and efficient memory usage.
• When you use yield return in an iterator method, it returns an IEnumerator object.
• You can iterate through the elements using the MoveNext() method to advance to the next item and the Current property to access the current element.

What is the visibility in C#?

• public: Accessible from any other code in the same assembly or another assembly that references it.
• private: Accessible only within the containing class or struct.
• protected: Accessible within its class and its child classes.

What is the inheritance of C#?

• abstract: Empty, must be implemented by derived classes.
• virtual: Have content, can be overridden in derived classes.