public EntityCreator(Transaction trans,
string blockname,
string layername)
{
_trans = trans;
_blocktable = Active.BlockTableForRead(_trans);
_modelspace = Active.ModelSpaceForWrite(_trans);
if (!_blocktable.Has(blockname))
{
throw new ArgumentException(
"Error while constructing new EntityCreator: No Block named " +
$"\"{blockname}\" found in provided blocktable.");
}
_blockname = blockname;
Active.CreateLayerIFNonExisting(layername);
_layername = layername;
}