//Get the Data from the Clipboard
IDataObject clipBoardDataObject = Clipboard.GetDataObject();

//The format of the object data is "ESRI Layers" (this can be checked using clipBoardDataObject.GetFormats();)
MemoryStream geomStream = clipBoardDataObject.GetData("ESRI Layers") as MemoryStream;
byte[] bytes = geomStream.ToArray();

IMemoryBlobStreamVariant memoryBlobStreamVariant = new MemoryBlobStreamClass();
memoryBlobStreamVariant.ImportFromVariant(bytes);
IMemoryBlobStream2 memoryBlobStream = memoryBlobStreamVariant as IMemoryBlobStream2;
IStream stream = memoryBlobStream as IStream;
IObjectStream objectStream = new ObjectStreamClass();
objectStream.Stream = stream;

byte pv;
uint cb = sizeof(int);
uint pcbRead;

objectStream.RemoteRead(out pv, cb, out pcbRead);
int count = Convert.ToInt32(pv);

//Guid you find in the ESRI ILayer Interface
Guid iLayerGuid = new Guid("34C20002-4D3C-11D0-92D8-00805F7C28B0");

for (int i = 0; i < count; i++)
{
  object o = objectStream.LoadObject(ref iLayerGuid, null);
  ILayer layer = o as ILayer;
}

//Get the Data from the Clipboard
IDataObject clipBoardDataObject = Clipboard.GetDataObject();

MemoryStream geomStream = clipBoardDataObject.GetData("ESRI Geometry List") as MemoryStream;
byte[] bytes = geomStream.ToArray();

IMemoryBlobStreamVariant memoryBlobStreamVariant = new MemoryBlobStreamClass();
memoryBlobStreamVariant.ImportFromVariant(bytes);
IMemoryBlobStream2 memoryBlobStream = memoryBlobStreamVariant as IMemoryBlobStream2;
IStream stream = memoryBlobStream as IStream;
IObjectStream objectStream = new ObjectStreamClass();
objectStream.Stream = stream;

byte pv;
uint cb = sizeof(int);
uint pcbRead;

objectStream.RemoteRead(out pv, cb, out pcbRead);
int count = Convert.ToInt32(pv);

//What to do next? What object do I need to unpack to?