Try to change the location of mtext when loop is itrate.

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C#3.5

AutoCAD

[CommandMethod("FindAllHatches")]
public static void FindAllHatches()
{
    Document acDoc = Application.DocumentManager.MdiActiveDocument;
 var str=new StringBuilder();
    str.Append("\nSearching for Hatches");
 
    var db = acDoc.Database;
    using (Transaction transaction = db.TransactionManager.StartTransaction())
    {
        ObjectId idModelSpace = SymbolUtilityServices.GetBlockModelSpaceId(db);
 
        BlockTableRecord modelSpace = transaction.GetObject(idModelSpace, OpenMode.ForRead) as
            BlockTableRecord;
 
        foreach (var objId in modelSpace)
        {
            var entity = transaction.GetObject(objId, OpenMode.ForRead);
            Hatch hatch = entity as Hatch;
            if (hatch == null)
                continue; //not hatch

           str.Append("\nFound Hatch Area={0}", hatch.Area);
        } 
 acDoc.Editor.WriteMessage(str.ToString());           
    }
}

What I have tried:

The above code is calculate the area of hatches in my autocad drawing, i want to display the area of each hatch seprately in my drawing but when loop is iterate the output is overwrite on each other. Suggest me the code to calculate the area and display seprately from each other.