Elements in array of user-defined type all change when one changes [duplicate]

There is an illogical change happening in my array called "animals". Whenever I change one element in the array, all the other elements change along with it. I have no idea why this is happening.

When I run the program below, the console writes

Sugar, Dog Sugar, Dog 

That should not be happening. I should be getting

Fluffy, Cat Sugar, Dog 

Please look at the relevant code below:

//Program.cs namespace AnimalProgram { class Program { static void Main(string[] args) { AnimalInfo vitalStats = new AnimalInfo("vital statistics", new string[] { "name", "sex", "species", "breed", "age" }); //name, species, breed, sex, age. AnimalInfo veterinarian = new AnimalInfo("veterinarian", new string[] { "Vet Name", "Name of Vet's Practice" }); List<AnimalInfo> animalStats = new List<AnimalInfo> {vitalStats, veterinarian }; Animal cat1 = new Animal(); Animal dog1 = new Animal(); Animal[] animals = new Animal[2] { cat1, dog1}; for(int i = 0; i < animals.Count(); i++) animals[i].initializeAnimalInfo(animalStats); AnimalInfo cat1vitals= new AnimalInfo("vital statistics", new string[] { "Fluffy", "F", "Cat", "American Shorthair", "5" }); AnimalInfo dog1vitals = new AnimalInfo("vital statistics", new string[] { "Sugar", "F", "Dog", "Great Dane", "7" }); AnimalInfo cat1vet = new AnimalInfo("veterinarian", new string[] { "Joe Schmoe", "Joe's Veterinary" }); AnimalInfo dog1vet = new AnimalInfo("veterinarian", new string[] { "Jim Blow", "Jim's Garage" }); cat1.UpdateAnimalInfo(new List<AnimalInfo>() { cat1vitals, cat1vet }); dog1.UpdateAnimalInfo(new List<AnimalInfo>() { dog1vitals, dog1vet }); Console.WriteLine(cat1.animalProperties[0].info[0] + ", " + cat1.animalProperties[0].info[2]); Console.WriteLine(dog1.animalProperties[0].info[0] + ", " + dog1.animalProperties[0].info[2]); Console.ReadLine(); } } 

}

//Animal.cs using System.Collections.Generic; using System.Linq; namespace AnimalProgram { class Animal { public List<AnimalInfo> animalProperties; public Animal() { } public void initializeAnimalInfo(List<AnimalInfo> aInfo) { animalProperties = aInfo; } public void UpdateAnimalInfo(List<AnimalInfo> targetInfo) { for (int i = 0; i < targetInfo.Count(); i++) animalProperties[i].info = targetInfo[i].info; } } 

}

//AnimalInfo.cs namespace AnimalProgram { public class AnimalInfo { public string infoName; public string [] info; public AnimalInfo(string iName, string [] information) { infoName = iName; info = information; } } 

}