1 files changed, 11 insertions, 0 deletions
diff --git a/src/Text/Def/TextUI/Operations/IEditorOperations3.cs b/src/Text/Def/TextUI/Operations/IEditorOperations3.cs
index e176fde..eceb30d 100644
--- a/src/Text/Def/TextUI/Operations/IEditorOperations3.cs
+++ b/src/Text/Def/TextUI/Operations/IEditorOperations3.cs
@@ -35,5 +35,16 @@ namespace Microsoft.VisualStudio.Text.Operations
         /// </para>
         /// </remarks>
         bool TrimTrailingWhiteSpace();
+
+        /// <summary>
+        /// Duplicates the current selection, or the whole line (if there is no selection), without changing the clipboard.
+        /// </summary>
+        /// <returns>
+        /// <c>true</c> if the edit succeeded, otherwise <c>false</c>.
+        /// </returns>
+        /// <remarks>
+        /// Multiple selection cases like block selection will treat each selection independently.
+        /// </remarks>
+        bool DuplicateSelection();
     }
 }