VS Immediate Window - The name does not exist in the current context

Question

I've had this thing that keeps bugging me in some parts of code and I have no idea what's causing it.

I have a block of code where I've set a breakpoint. If I then use my cursor and hover over a variable, I can usually navigate the contents and values of that variable.

Whereas some variables, I can't view the contents, nothing appears.

Also, if I try investigating those I can't through the immediate window, it tells me The name 'temp' does not exist in the current context

I'm really annoyed at just WHY this would be happening, some integers but not others, some class objects but not others of the same type.

Closing Visual Studio and restarting doesn't fix it.

I'm running in Debug with no optimization.

Just looking for some help with this issue so thanks in advance.

Here is an example of the code where it occurs, no special code or delegates. It can also happen in random parts of the program even if there are only a few lines of code.

segs2D = ConvertSegmentsTo3DLines(segs2D);
IList<DSegment2D> segs3D = DSegment2D.Duplicate(segs2D);
TransformSegments(segs3D, transform);
foreach (var seg in segs3D)
    MoveSegmentToSolid(seg, moveNormal, solid, false);

Dictionary<double, Strategy> strategiesDic = new Dictionary<double, Strategy>();

double d1 = (double)(segs3D[0].GetP1Tag() ?? 0);
double d2= (double)(segs3D[0].GetP2Tag() ?? 0);
foreach (DSegment2D seg in segs3D)
{
    d1= (double)(seg.GetP1Tag() ?? d1);
    d2= (double)(seg.GetP2Tag() ?? d2);
    ...Stuff
}

Answer 1

Also, if I try investigating those I can't through the immediate window, it tells me The name 'temp' does not exist in the current context

try to use the full name of the method

for example:

namespace.class.method();

instead of

class.method();

it also seems that the immediate window has a dependency to the current selected file/project.

hope this helps Mathias