非静态成员数组初始化的任何变通方法？

char[] myArray;
string str = "Data";
while (str.Length< sizeof(myArray)){
	myArray = new char[str.Length];
	str += str;
}

public class MyClass{
    private byte[] _myArray;
    public MyClass(){
        _myArray = new byte[10];
    }
}

public class MyClass{
    static byte[] _myArray;
    static MyClass(){
        _myArray = new byte[10];
    }
}

class Animal{
	string name;
	private Dog dog;

	public Animal(string name, Dog dog){
		this.name = name;
		this.dog = dog;
	}
}
class Dog{
	string breed;
	string color;
}

public static void Main(){
	Animal dog = new Animal("Buddy", new Dog{breed = "Labrador Retriever", color = "Yellow"});
}