Table entry name change

ACadSharp.Tests/Tables/TableEntryTests.cs

@@ -38,6 +38,22 @@ public void CloneUnattachEvent(Type t)
 			CadObjectTestUtils.AssertTableEntryClone(entry, clone);
 		}
 
+		[Fact()]
+		public void ChangeName()
+		{
+			string initialName = "custom_layer";
+			Layer layer = new Layer(initialName);
+
+			CadDocument doc = new CadDocument();
+
+			doc.Layers.Add(layer);
+
+			layer.Name = "new_name";
+
+			Assert.NotNull(doc.Layers[layer.Name]);
+			Assert.Null(doc.Layers[initialName]);
+		}
+
 		[Fact()]
 		public void SetFlagUsingMapper()
 		{

ACadSharp/OnNameChangedArgs.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace ACadSharp
+{
+	public class OnNameChangedArgs : EventArgs
+	{
+		/// <summary>
+		/// Old object name
+		/// </summary>
+		public string OldName { get; }
+
+		/// <summary>
+		/// New name to be assign at the object
+		/// </summary>
+		public string NewName { get; }
+
+		public OnNameChangedArgs(string oldName, string newName)
+		{
+			this.OldName = oldName;
+			this.NewName = newName;
+		}
+	}
+}

ACadSharp/Tables/Collections/Table.cs

@@ -132,7 +132,21 @@ protected void add(string key, T item)
 			this._entries.Add(key, item);
 			item.Owner = this;
 
+			item.OnNameChanged += this.onEntryNameChanged;
+
 			OnAdd?.Invoke(this, new CollectionChangedEventArgs(item));
 		}
+
+		private void onEntryNameChanged(object sender, OnNameChangedArgs e)
+		{
+			if (this._defaultEntries.Contains(e.OldName, StringComparer.InvariantCultureIgnoreCase))
+			{
+				throw new ArgumentException($"The name {e.OldName} belongs to a default entry.");
+			}
+
+			var entry = this._entries[e.OldName];
+			this._entries.Add(e.NewName, entry);
+			this._entries.Remove(e.OldName);
+		}
 	}
 }

ACadSharp/Tables/TableEntry.cs

@@ -6,6 +6,8 @@ namespace ACadSharp.Tables
 	[DxfSubClass(DxfSubclassMarker.TableRecord, true)]
 	public abstract class TableEntry : CadObject, INamedCadObject
 	{
+		public event EventHandler<OnNameChangedArgs> OnNameChanged;
+
 		/// <inheritdoc/>
 		public override string SubclassMarker => DxfSubclassMarker.TableRecord;
 
@@ -23,6 +25,7 @@ public string Name
 					// throw new System.ArgumentNullException(nameof(value), $"Table entry [{this.GetType().FullName}] must have a name");
 				}
 
+				OnNameChanged?.Invoke(this, new OnNameChangedArgs(this._name, value));
 				this._name = value;
 			}
 		}