ImmutableArray is a class in C# that provides an immutable array implementation. It provides a way to create an array that cannot be modified after creation. The AddRange method of the ImmutableArray class is used to add a range of elements to an immutable array.
In this example, we create an initial array with three elements. We then use the AddRange method to add three more elements to the array. The updatedArray variable contains the new, updated array.
Example 2:
var person1 = new { Name = "John", Age = 25 };
var person2 = new { Name = "Mary", Age = 30 };
ImmutableArray