What is the difference between this initialization methods?

Question

What is the difference between this two codes?

class SomeClass   
{   

   SomeType val = new SomeType();   

}   

and

<         


        

Answer 1

There is almost not difference between them. The assignment of the field will happen within the constructor in both cases. There is a difference in how this happpens in relation to base class constructors though. Take the following code:

class Base
{
    public Base()
    {

    }
}

class One : Base
{
    string test = "text";
}

class Two : Base
{
    string test;
    public Two()
    {
        test = "text";
    }
}

In this case the base class constructor will be invoked after the field assignment in the class One, but before the assignment in class Two.

Answer 2

The first version allows you to define multiple constructors without having to remember to put the = new SomeType() in each one.