What is the role of IComparer<T> and IEqualityComparer<T> in sorting and comparing collections?

• IComparer<T> defines a method Compare(T x, T y) for custom sorting logic

(used in sorting operations like Sort()).

• IEqualityComparer<T> defines methods Equals(T x, T y) and

GetHashCode(T obj) to determine equality and hashing (used in dictionaries,

Follow:

sets, etc.).

• They allow collections to customize how items are compared or checked for equality,

beyond default implementations.