By Barbara Han
When using C# in .NET., one developer got an error “"cannot explicitly call operator or accessor" when he tried to build his project that uses certain functions. Both utodesk.AutoCAD.DatabaseServices.Entity.get_LayerId and Autodesk.AutoCAD.DatabaseServices.Entity.get_Layer fail with this error.
The reason is that you should not use any get_ methods. To get an entity’s layer name, use the Entity.Layer property instead, as demonstrated in the following sample:
// Modal Command with localized name
[CommandMethod("MyGroup", "MyCommand", "MyCommandLocal", CommandFlags.Modal)]
public void MyCommand() // This method can have any name
{
// Put your command code here
Document curDoc = Application.DocumentManager.MdiActiveDocument;
Database db = curDoc.Database;
Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = db.TransactionManager;
using (Transaction myT = tm.StartTransaction())
{
BlockTable bt = (BlockTable)tm.GetObject(db.BlockTableId, OpenMode.ForRead, false);
BlockTableRecord btr = (BlockTableRecord)tm.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead,false);
foreach (ObjectId acObjId in btr)
{
Entity ent = (Entity)myT.GetObject(acObjId, OpenMode.ForRead);
string myLayName;
myLayName = ent.Layer;
}
myT.Commit();

0; }
}
This is same for other methods, for example get_LinetypeScale().
double myScale;
//myScale = ent.get_LinetypeScale();
//Use .LinetypeScale instead
myScale = ent.LinetypeScale;
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