GL.DrawElements() crashs when using a big array.

Hello, folks.
I`m developing an application that draws a ruge triangulated points cloud using OpenTK.

Take a look at this code:

...
GL.DrawElements( BeginMode.Triangles, triangles.Count, DrawElementsType.UnsignedInt, triangles.ToArray() );
...

When the execution reaches this line, my program crashes and tells me that vshost.exe stopped to work.

Details of the call:

triangles.Count = 9.999.999
triangles.ToArray() return a reference, because is a customized List, so it does not return a copy, like the default c# List.

My environment:

Windows 7 64 bits
Visual Studio 2010 Express

Does anyone knows if exists some limits of memory usage on DrawElements()?
Maybe OpenTK has the 32bit memory limit?!

Thanks

Ricardo Bueno
CharPointer