“Overflow or underflow in the arithmetic operation” WPF specific issue

Question

My WPF test app (very simple, just one window) is using a 3rd party managed dll (say X.dll). This managed dll uses some unmanaged dll\'s . So lets say I write a small wpf a

Answer 1

Following the link from @Mishhl the fix is

public class FloatingPointReset
{
    [DllImport("msvcr110.dll", CallingConvention = CallingConvention.Cdecl)]
    public static extern int _fpreset();


    public static void Action()
    {
        // Reset the Floating Point (When called from External Application there was an Overflow exception)
        _fpreset();
    }
}

It's caused by something in an included DLL resetting the FP into a state that isn't compatible with WPF/C#/Microsoft DLL's. Delphi/CPPB does this by default.

So in either the window constructor or App() constructor just do

FloatingPointReset.Action();

You may need to change the following to reference any version of msvcr###.dll

[DllImport("msvcr110.dll", CallingConvention = CallingConvention.Cdecl)]

e.g.

[DllImport("msvcr70.dll", CallingConvention = CallingConvention.Cdecl)]