[Debugger] Fixed An item with the same key has already been added. Key: Mono.Debugging.Client.Breakpoint

Fixes https://devdiv.visualstudio.com/DevDiv/_workitems/edit/824644

1 files changed, 13 insertions, 7 deletions

diff --git a/main/src/addins/MonoDevelop.Debugger.VSCodeDebugProtocol/MonoDevelop.Debugger.VsCodeDebugProtocol/VSCodeDebuggerSession.cs b/main/src/addins/MonoDevelop.Debugger.VSCodeDebugProtocol/MonoDevelop.Debugger.VsCodeDebugProtocol/VSCodeDebuggerSession.cs
index c9e5959fbc..c48f1599d3 100644
--- a/main/src/addins/MonoDevelop.Debugger.VSCodeDebugProtocol/MonoDevelop.Debugger.VsCodeDebugProtocol/VSCodeDebuggerSession.cs
+++ b/main/src/addins/MonoDevelop.Debugger.VSCodeDebugProtocol/MonoDevelop.Debugger.VsCodeDebugProtocol/VSCodeDebuggerSession.cs
@@ -104,20 +104,26 @@ namespace MonoDevelop.Debugger.VsCodeDebugProtocol
 
 		protected override BreakEventInfo OnInsertBreakEvent (BreakEvent breakEvent)
 		{
+			BreakEventInfo breakEventInfo;
+
+			if (breakpoints.TryGetValue (breakEvent, out breakEventInfo))
+				return breakEventInfo;
+
+			breakEventInfo = new BreakEventInfo ();
+
 			if (breakEvent is Mono.Debugging.Client.Breakpoint) {
-				var breakEventInfo = new BreakEventInfo ();
-				breakpoints.Add ((Mono.Debugging.Client.Breakpoint)breakEvent, breakEventInfo);
+				breakpoints.Add (breakEvent, breakEventInfo);
 				UpdateBreakpoints ();
-				return breakEventInfo;
 			} else if (breakEvent is Catchpoint) {
-				var catchpoint = (Catchpoint)breakEvent;
-				var breakEventInfo = new BreakEventInfo ();
 				breakpoints.Add (breakEvent, breakEventInfo);
 				UpdateExceptions ();
-				return breakEventInfo;
+			} else {
+				throw new NotImplementedException (breakEvent.GetType ().FullName);
 			}
-			throw new NotImplementedException (breakEvent.GetType ().FullName);
+
+			return breakEventInfo;
 		}
+
 		bool currentExceptionState = false;
 		void UpdateExceptions ()
 		{