Serializing hatches

Hi!

I need to serialize hatches in order to use them as a resource in visual studio.

With some code snippets I found on the forum, I've gotten it to work for very simple hatches, but as soon as they become more complicated, RhinoCommon.dll throws an exception. It's stopping on the byte-conversion using GH_Convert.

Excteption: "
A first chance exception of type 'System.ArgumentNullException' occurred in RhinoCommon.dll

Additional information: Value cannot be null.

If there is a handler for this exception, the program may be safely continued.
"

Any ideas?

Hatch hatch;

Rhino.DocObjects.RhinoObject[] objects = Rhino.RhinoDoc.ActiveDoc.Objects.FindByLayer("Default");
List hatches = new List();

for (int i = 0; i < objects.Length; i++)
{
try
{
hatches.Add((Hatch)objects[i].Geometry.Duplicate());
}

catch
{
continue;
}
}

string path = @"C:\\testing\\points.bin";

System.IO.FileStream stream = new System.IO.FileStream(path, System.IO.FileMode.Create);
System.IO.BinaryWriter writer = new System.IO.BinaryWriter(stream);

writer.Write(hatches.Count);

for (int i = 0; i < hatches.Count; i++)
{
byte[] hatchData = GH_Convert.CommonObjectToByteArray(hatches[i]);
if (hatchData == null || hatchData.Length == 0)
return;

writer.Write("hatchname");
writer.Write(hatchData.Length);
writer.Write(hatchData);

}

writer.Dispose();
stream.Dispose();

List outputHatches = new List();

// Step 3. Read data from disk.

stream = new System.IO.FileStream(path, System.IO.FileMode.Open);
System.IO.BinaryReader reader = new System.IO.BinaryReader(stream);

int hatchCount = reader.ReadInt32();

for (int i = 0; i < hatchCount; i++)
{
string hatchName = reader.ReadString();
int dataLength = reader.ReadInt32();
if (dataLength <= 0)
return;

byte[] hatchData = reader.ReadBytes(dataLength);

hatch = GH_Convert.ByteArrayToCommonObject(hatchData);

outputHatches.Add(hatch);
}

reader.Dispose();
stream.Dispose();