UID barID = new ESRI.ArcGIS.esriSystem.UIDClass();
barID.Value = "esriEditor.EditorToolBar";// Example: "esriArcMapUI.StandardToolBar"
//得到Editor工具条
ICommandItem barItem = commandBars.Find(barID, false, false);
if (barItem != null && barItem.Type == esriCommandTypes.esriCmdTypeToolbar)
{
　　ESRI.ArcGIS.Framework.ICommandBar commandBar = (ESRI.ArcGIS.Framework.ICommandBar)barItem;
   //打开Editor工具条
   commandBar.Dock(esriDockFlags.esriDockShow, null);

   IEngineEditLayers editLayers = editor as IEngineEditLayers;
　　IFeatureLayer featureLayer = waterLayer as IFeatureLayer;
　　IDataset dataset = featureLayer.FeatureClass as IDataset;
　　IWorkspace workspace = dataset.Workspace;

　　UID editorID = new UIDClass();
　　editorID.Value = "esriEditor.Editor";
　　IEditor editor = m_application.FindExtensionByCLSID(editorID) as IEditor;

    if (editor != null)
　　{
　　　　editor.StartEditing(workspace);
　　}
　　else
　　{
　　　　MessageBox.Show("不可编辑，请确认图层没有被其它程序打开。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
　　}
}