What is the c# equivalent of Java 8 java.util.function.Consumer<>?

"Consumer interface represents an operation that accepts a single input argument and returns no result"

Well, provided that this quote was taken from here is accurate it’s roughly an equivalent of the Action<T> delegate in C#;

For example this java code:

import java.util.function.Consumer;

public class Main {
  public static void main(String[] args) {
    Consumer<String> c = (x) -> System.out.println(x.toLowerCase());
    c.accept("Java2s.com");
  }
}

Converted to C# would be:

using System;

public class Main
{
  static void Main(string[] args)
  {
     Action<string> c = (x) => Console.WriteLine(x.ToLower());
     c.Invoke("Java2s.com"); // or simply c("Java2s.com");
  }
}

Consumer<T> corresponds to Action<T> and the andThen method is a sequencing operator. You can define andThen as an extension method e.g.

public static Action<T> AndThen<T>(this Action<T> first, Action<T> next)
{
    return e => { first(e); next(e); };
}