C# getter vs readonly

Question

Is there any difference between the following?

class C
{
    // One:
    public static readonly int ValueAsAMember = 42;

    // Two:
    public static int V         


        

Answer 1

There are two major differences:

The first is that fields cannot be on interfaces, whereas properties can. So if you want to use this in an interface, you have to use the property.

The second, more interesting, is that readonly fields CAN be modified, while the object is being constructed. Take the following code:

public class MyTestClass
{
    public readonly int MyInt = 1;

    public MyTestClass()
    {
        MyInt = 2;
    }
}

If a caller does

new MyTestClass().MyInt

they will get 2. The same goes for static constructors for a static readonly field.