From 6db7687c7823831eec0992ba7ebd9d0be8cf0b39 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Thu, 18 Aug 2016 23:15:14 +0200
Subject: [PATCH] Unpack AggregateException in TextBox.

---
 src/Avalonia.Controls/TextBox.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/TextBox.cs b/src/Avalonia.Controls/TextBox.cs
index 409e416680..5552d3d3c5 100644
--- a/src/Avalonia.Controls/TextBox.cs
+++ b/src/Avalonia.Controls/TextBox.cs
@@ -495,11 +495,17 @@ namespace Avalonia.Controls
                 else
                 {
                     classes.Add(":error");
-                    DataValidationErrors = new[] { status.Error };
+                    DataValidationErrors = UnpackException(status.Error);
                 }
             }
         }
 
+        private static IEnumerable<Exception> UnpackException(Exception exception)
+        {
+            var aggregate = exception as AggregateException;
+            return aggregate == null ? Enumerable.Repeat(exception, 1) : aggregate.InnerExceptions;
+        }
+
         private int CoerceCaretIndex(int value)
         {
             var text = Text;