How does IComparer work in C#?

IComparable.CompareTo(Object) Method (System) Compares the current instance with another object of the same type and returns an integer that indicates whether the current instance precedes, follows, or occurs in the same position in the sort order as the other object.

How do you implement IComparable interface?

It requires that implementing types define a single method, CompareTo(Object), that indicates whether the position of the current instance in the sort order is before, after, or the same as a second object of the same type. The instance’s IComparable implementation is called automatically by methods such as Array.

What is the difference between IComparer and IComparable in C#?

IComparer compares two objects that it’s given. IComparable is implemented by the object that is being compared, for the purpose of comparing with another one of itself.

Why do we use IComparable in C#?

Use the IComparable Interface in C# to sort elements. It is also used to compare the current instance with another object of same type. It provides you with a method of comparing two objects of a particular type. Remember, while implementing the IComparable interface, CompareTo() method should also be implemented.

How do you sort a list in C#?

Sort() Method Set -1. List. Sort() Method is used to sort the elements or a portion of the elements in the List using either the specified or default IComparer implementation or a provided Comparison delegate to compare list elements.

How does an IEnumerator differ from an IEnumerable?

An IEnumerator is a thing that can enumerate: it has the Current property and the MoveNext and Reset methods (which in . NET code you probably won’t call explicitly, though you could). An IEnumerable is a thing that can be enumerated…which simply means that it has a GetEnumerator method that returns an IEnumerator .

What is Linq used for in C#?

LINQ (Language Integrated Query) is uniform query syntax in C# and VB.NET to retrieve data from different sources and formats. It is integrated in C# or VB, thereby eliminating the mismatch between programming languages and databases, as well as providing a single querying interface for different types of data sources.