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.NET: Add error checking to workflow samples #5175

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351202e
Initial plan
Copilot Apr 8, 2026
f5ef6e7
Add WorkflowErrorEvent and ExecutorFailedEvent error checking to all …
Copilot Apr 8, 2026
61fc801
Fix if/else if consistency for error event handlers per code review f…
Copilot Apr 8, 2026
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Agents/FoundryAgent/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,18 @@ private static async Task Main()
{
Console.WriteLine($"{executorComplete.ExecutorId}: {executorComplete.Data}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
finally
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Agents/GroupChatToolApproval/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,18 @@ private static async Task Main()

break;
}

case WorkflowErrorEvent workflowError:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
break;

case ExecutorFailedEvent executorFailed:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
break;
}
}

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26 changes: 26 additions & 0 deletions dotnet/samples/03-workflows/Checkpoint/CheckpointAndRehydrate/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,19 @@ private static async Task Main()
{
Console.WriteLine($"Workflow completed with result: {outputEvent.Data}");
}

if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}

if (checkpoints.Count == 0)
Expand Down Expand Up @@ -86,6 +99,19 @@ private static async Task Main()
{
Console.WriteLine($"Workflow completed with result: {workflowOutputEvt.Data}");
}

if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
26 changes: 26 additions & 0 deletions dotnet/samples/03-workflows/Checkpoint/CheckpointAndResume/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,19 @@ private static async Task Main()
{
Console.WriteLine($"Workflow completed with result: {workflowOutputEvt.Data}");
}

if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}

if (checkpoints.Count == 0)
Expand All @@ -80,6 +93,19 @@ private static async Task Main()
{
Console.WriteLine($"Workflow completed with result: {workflowOutputEvt.Data}");
}

if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
20 changes: 20 additions & 0 deletions dotnet/samples/03-workflows/Checkpoint/CheckpointWithHumanInTheLoop/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,16 @@ private static async Task Main()
case WorkflowOutputEvent workflowOutputEvt:
Console.WriteLine($"Workflow completed with result: {workflowOutputEvt.Data}");
break;
case WorkflowErrorEvent workflowError:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
break;
case ExecutorFailedEvent executorFailed:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
break;
}
}

Expand Down Expand Up @@ -92,6 +102,16 @@ private static async Task Main()
case WorkflowOutputEvent workflowOutputEvt:
Console.WriteLine($"Workflow completed with result: {workflowOutputEvt.Data}");
break;
case WorkflowErrorEvent workflowError:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
break;
case ExecutorFailedEvent executorFailed:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
break;
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Concurrent/MapReduce/Program.cs
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Expand Up @@ -119,6 +119,18 @@ private static async Task RunWorkflowAsync(Workflow workflow)
}
}
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/ConditionalEdges/01_EdgeCondition/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,18 @@ private static async Task Main()
{
Console.WriteLine($"{outputEvent}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}

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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/ConditionalEdges/02_SwitchCase/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,18 @@ private static async Task Main()
{
Console.WriteLine($"{outputEvent}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}

Expand Down
13 changes: 13 additions & 0 deletions dotnet/samples/03-workflows/ConditionalEdges/03_MultiSelection/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,19 @@ private static async Task Main()
{
Console.WriteLine($"{databaseEvent}");
}

if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}

Expand Down
12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/HumanInTheLoop/HumanInTheLoopBasic/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,18 @@ private static async Task Main()
// The workflow has yielded output
Console.WriteLine($"Workflow completed with result: {outputEvt.Data}");
return;

case WorkflowErrorEvent workflowError:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
return;

case ExecutorFailedEvent executorFailed:
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
break;
}
}
}
Expand Down
12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Loop/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,18 @@ private static async Task Main()
{
Console.WriteLine($"Result: {outputEvent}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Observability/ApplicationInsights/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,18 @@ private static async Task Main()
{
Console.WriteLine($"{executorComplete.ExecutorId}: {executorComplete.Data}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
Expand Down
12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/Observability/AspireDashboard/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,18 @@ private static async Task Main()
{
Console.WriteLine($"{executorComplete.ExecutorId}: {executorComplete.Data}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/SharedStates/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,18 @@ private static async Task Main()
{
Console.WriteLine(outputEvent.Data);
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/_StartHere/01_Streaming/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,18 @@ private static async Task Main()
{
Console.WriteLine($"{executorCompleted.ExecutorId}: {executorCompleted.Data}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}
}
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/_StartHere/02_AgentsInWorkflows/Program.cs
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Expand Up @@ -56,6 +56,18 @@ private static async Task Main()
{
Console.WriteLine($"{executorComplete.ExecutorId}: {executorComplete.Data}");
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}
}

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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/_StartHere/03_AgentWorkflowPatterns/Program.cs
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Expand Up @@ -111,6 +111,18 @@ static async Task<List<ChatMessage>> RunWorkflowAsync(Workflow workflow, List<Ch
Console.WriteLine();
return output.As<List<ChatMessage>>()!;
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}

return [];
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12 changes: 12 additions & 0 deletions dotnet/samples/03-workflows/_StartHere/05_SubWorkflows/Program.cs
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Expand Up @@ -74,6 +74,18 @@ private static async Task Main()
Console.WriteLine($"Final Output: {output.Data}");
Console.ResetColor();
}
else if (evt is WorkflowErrorEvent workflowError)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine(workflowError.Exception?.ToString() ?? "Unknown workflow error occurred.");
Console.ResetColor();
}
else if (evt is ExecutorFailedEvent executorFailed)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.WriteLine($"Executor '{executorFailed.ExecutorId}' failed with {(executorFailed.Data == null ? "unknown error" : $"exception {executorFailed.Data}")}.");
Console.ResetColor();
}
}

// Optional: Visualize the workflow structure - Note that sub-workflows are not rendered
Expand Down
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