Accessing a member on Form may cause a runtime exception because it is a field of a marshal-by-reference class

Question

Accessing a member on Form may cause a runtime exception because it is a field of a marshal-by-reference class

I know what this warnin

Answer 1

In addition to the suggestion from @hans-passant, I think another useful way to fix this warning is by turning your field into a property.

public class Remotable : MarshalByRefObject {
    public int field;
}

could become

public class Remotable : MarshalByRefObject {
    public int field { get; set }
}

and you no longer get any warnings! (Hans Passant already has an excelent explanation for this, see his post)

Obviously, you can not always alter the object you are working with (example: WinForms where the fields are generated for you) so you might have to fallback to using a temporary variable.