ExceptionTelemetry clears all Context setting after setting ExceptionTelemetry.Exception

[ghost]

• Verified using version 2.14.0 (with .NET 4.5) and 2.15.0 (with .NET 4.5.2)
• Hosting environment is Windows

Describe the bug

A new context is created in an ExceptionTelemetry instance when using the Exception property setter. This unexpectedly clears any previously set Context values from the object.

To Reproduce

$ex = new-object Microsoft.ApplicationInsights.DataContracts.ExceptionTelemetry
$ex.Context.User.AccountId = "AccountId"
$ex.Context.User.AuthenticatedUserId = "AuthUserId"
$ex.Context.User.UserAgent = "ExceptionComponent"

Write-Host "Before"
Write-Host "-----------------------------------------------------"
$ex.Context.User | fl -Force

$ex.Exception = new-object System.Exception

Write-Host "After"
Write-Host "-----------------------------------------------------"
$ex.Context.User | fl -Force

Example output:

Observe that in the "Before", the Context.User object is populated with values, and in the "After" it has been cleared away. Looking at the code, it looks like a brand new TelemetryContext is created when the setter for the Exception property is used.

This seems like unexpected behavior and it is not specifically called out in the API documentation. Setting the exception value from outside of the .ctor should not clear the existing Context values.

[avereshchak]

+1. It was totally unexpected to me after I implemented a telemetry processor which analyzes and hides sensitive exception data. I had to copy data from original context into a new one created by ExceptionTelemetry.Exception setter.

[github-actions]

This issue is stale because it has been open 300 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[ghost]

AFAICT this is still an active issue. I'm not a collaborator so I can't reopen this.

[github-actions]

This issue is stale because it has been open 300 days with no activity. Remove stale label or this will be closed in 7 days. Commenting will instruct the bot to automatically remove the label.

[avereshchak]

It's still there. Double-checked on Microsoft.ApplicationInsight 2.21.