Type Initializer throwing an error

[SezMe]

For a wpf Window called GeoElements with a grid column named C0, I have:

Trackr.Configure(Of GeoElements)().Property(Function(g) New With {Key g.C0.Width}).PersistOn(NameOf(GeoElements.Closing)).StopTrackingOn(NameOf(GeoElements.Closing))

This throws an error at run-time:

Inner Exception 1:
ArgumentException: Expression must project properties as an anonymous class e.g. f => new { f.Height, f.Width } or access a single property e.g. f => f.Text.

[anakic]

It's due to VB.NET generating a different expression tree than C# for anonymous type projections. VB.NET wraps the expression tree in an additional cast expression which Jot was not expecting.

I've updated Jot to handle the expression trees that VB.NET generates and have pushed the updated code to GitHub and an updated NuGet package to nuget.org.

Let me know if the update solves it for you.

[anakic]

Closing this as the latest commit resolves the problem. @SezMe please let me know if you still have issues with this.

[SezMe]

I still get an error, but it now raises a new one:

Inner Exception 1:
ArgumentException: Expression must be writeable
Parameter name: left

This is the code that throws the exception:

Trackr.Configure(Of Window)().Id(Function(w) w.Name, SystemInformation.VirtualScreen.Size).Property(Function(w) w.Top).Property(Function(w) w.Left).Property(Function(w) w.Height).Property(Function(w) w.Width).PersistOn(NameOf(Window.Closing)).StopTrackingOn(NameOf(Window.Closing))

I'm using 2.1.8 which NUGet says is the latest version.