Most concise way to initialize a C# hashtable

Does C# allow hashtables to be populated in one-line expressions? I am thinking of something equivalent to the below Python:

mydict = {"a": 23, "b": 45, "c": 67, "d": 89}

In other words, is there an alternative to setting each key-value pair in a separate expression?

From stackoverflow

• C# 3 has a language extension called collection initializers which allow you to initialize the values of a collection in one statement.

  Here is an example using a Dictionary<,>:

  using System;
  using System.Collections.Generic;
  
  class Program
  {
      static void Main()
      {
       var dict = new Dictionary<string, int>
       {
        {"a", 23}, {"b", 45}, {"c", 67}, {"d", 89}
       };
      }
  }
  

  This language extension is supported by the C# 3 compiler and any type that implements IEnumerable and has a public Add method.

  If you are interested I would suggest you read this question I asked here on StackOverflow as to why the C# team implemented this language extension in such a curious manner (once you read the excellent answers to the question you will see that it makes a lot of sense).