Deletes a layer from the map.
[Visual Basic .NET]
Public Sub DeleteLayer ( _
    ByVal Layer As ILayer _
)
[C#]
public void DeleteLayer (
    ILayer Layer
);
[C++]
HRESULT DeleteLayer(
  ILayer* Layer
);
[C++]
Parameters
Layer [in]
  Layer is a parameter of type ILayer*
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. 
Remarks
DeleteLayer will automatically recalculate the Map's extent after the successful deletion of a layer. 
Tips: 
If a layer is selected in the TOC window (IMxDocument::SelectedLayer), you can pass this to DeleteLayer. 
When deleting a layer that references a feature class, like a FeatureLayer, executing 
IDataLayer2::Disconnect will ensure that references to the feature class are cleared. 
See Also
IMap Interface