I have some trouble to port an existing .NET 3.5 Application to .NET 4.0. The Code isn't written by myself so I didn´t know in detail why the things are as they are.
This is the Situation: Code works fine if the application is started from Visual Studio (Release or Debug-Mode doesn’t matter) and also if the application is started form Debug-folder The Problem is the Release-deploy, because is doesn’t work well since 4.0 (and also in 4.5) :-/
This is the initial call:
someObject.Text = Elements.GetElement(Int16.Parse(cb1.Text));
And Here is the code:
public class Elements : EnumBase<int, Elements>
{
public static readonly Elements Element1 = Create("Number 0", 0);
public static readonly Elements Element2 = Create("Number 1", 1);
private static Elements Create(string text, int value)
{
return new Elements() { text = text, value = value };
}
public static String GetElement(int id)
{
// The Following Code safes the day and let the release deploy work fine.
// It doesn´t matter if the condition becomes true or not to runtime.
/*
if (id == 999999999)
{
Elements el = Element1;
}
*/
// Release deploy works also fine if you do the following line in a loop instead of linq.
return BaseItemList.Single(v => v.Value == id).Text;
}
}
[Serializable()]
public class EnumBase<T, E> : IEqualityComparer<E>
where E : EnumBase<T, E>
{
private static readonly List<E> list = new List<E>();
protected string text;
protected T value;
protected static IList<E> BaseItemList
{
get
{
return list.Distinct(new EnumBase<T, E>(false)).ToList();
}
}
protected EnumBase()
{
list.Add(this as E);
}
/// <summary>
/// Constructor for distinct to avoid empty elements in the list
/// </summary>
private EnumBase(bool egal) {}
public string Text
{
get { return text; }
}
public T Value
{
get { return value; }
}
#region IEqualityComparer<E> Member
// ...
#endregion
}
The key is return BaseItemList.Single(v => v.Value == id).Text;. It throws a InvalidOperationException, because in Release
public static readonly Elements Element1 = Create("Number 0", 0); and public static readonly Elements Element2 = Create("Number 1", 1); aren't ready. In the moment of the Exception is BaseItemList empty (BaseItemList.Count = 0).
I am not sure why this happened in release form bin-folder and not in release out of visual studio.
For tests I deactivated "Optimize code" in project-properties but it doesn’t help.
Surely the construct isn't the best, but I want to know what is different in .Net 4.0 that bring the code to flatter.
Thanks for help