Ensure Variable Initialization C#

Question

Consider this code:

public string Variable1 { get; set;}
public int Variable2 { get; set;}

public void Function()
{
 // Has been Variable1 Initialized?
}

Inside the function, I want to know if a value has been sent to Variable1 & Variable2, prior to the function call,

even if the DEFAULT values have been sent, that's ok (null for string & 0 for int)

Answer 1

Consider using a simple wrapper like this:

public struct AssignableProperty<T>
{
    private T _value;

    public T Value
    {
        get { return _value; }
        set
        {
            WasAssigned = true;
            _value = value;
        }
    }

    public bool WasAssigned { get; private set; }

    public static implicit operator AssignableProperty<T>(T data)
    {
        return new AssignableProperty<T>() { Value = data };
    }

    public static bool operator ==(AssignableProperty<T> initial, T data)
    {
        return initial.Value.Equals(data);
    }

    public static bool operator !=(AssignableProperty<T> initial, T data)
    {
        return !initial.Value.Equals(data);
    }

    public override string ToString()
    {
        return Value.ToString();
    }
}

Then your class'll look like this:

public class Test
{
    public AssignableProperty<string> Variable1 { get; set; }
    public AssignableProperty<int> Variable2 { get; set; }

    public void Function()
    {
        if(Variable1.WasAssigned&&Variable2.WasAssigned)
            //do stuff
    }
}

You can go further and add throw Exception or contract to getter, so if somebody'll try to access uninitialized value it'll throw an exception or show you warning