How can I set the value of auto property backing fields in a struct constructor?

Given a struct like this:

public struct SomeStruct
{
    public SomeStruct(String stringProperty, Int32 intProperty)
    {
        this.StringProperty = stringProperty;
        this.IntProperty = intProperty;
    }

    public String StringProperty { get; set; }
    public Int32 IntProperty { get; set; }
}

Of course, a compiler error is generated that reads The 'this' object cannot be used before all of its fields are assigned to.

Is there a way to assign values to the backing fields or the properties themselves, or do I have to implement properties the old-fashioned way with my own explicit backing fields?