retain original TimeoutException

Author: JamieMagee

src/Microsoft.ComponentDetection.Common/AsyncExecution.cs

@@ -28,9 +28,9 @@ public static async Task<T> ExecuteWithTimeoutAsync<T>(Func<Task<T>> toExecute,
         {
             return await work.WaitAsync(timeout, cancellationToken);
         }
-        catch (TimeoutException)
+        catch (TimeoutException ex)
         {
-            throw new TimeoutException($"The execution did not complete in the allotted time ({timeout.TotalSeconds} seconds) and has been terminated prior to completion");
+            throw new TimeoutException($"The execution did not complete in the allotted time ({timeout.TotalSeconds} seconds) and has been terminated prior to completion", ex);
         }
     }
 
@@ -43,7 +43,6 @@ public static async Task<T> ExecuteWithTimeoutAsync<T>(Func<Task<T>> toExecute,
     /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
     /// <exception cref="ArgumentNullException">Thrown when <paramref name="toExecute"/> is null.</exception>
     /// <exception cref="TimeoutException">Thrown when the execution does not complete within the timeout.</exception>
-    /// <remarks>NOTE: If the function to execute does not respect cancellation tokens, it may continue running in the background after a timeout.</remarks>
     public static async Task ExecuteVoidWithTimeoutAsync(Action toExecute, TimeSpan timeout, CancellationToken cancellationToken = default)
     {
         ArgumentNullException.ThrowIfNull(toExecute);
@@ -54,9 +53,9 @@ public static async Task ExecuteVoidWithTimeoutAsync(Action toExecute, TimeSpan
         {
             await work.WaitAsync(timeout, cancellationToken);
         }
-        catch (TimeoutException)
+        catch (TimeoutException ex)
         {
-            throw new TimeoutException($"The execution did not complete in the allotted time ({timeout.TotalSeconds} seconds) and has been terminated prior to completion");
+            throw new TimeoutException($"The execution did not complete in the allotted time ({timeout.TotalSeconds} seconds) and has been terminated prior to completion", ex);
         }
     }
 }