From af113224c6d14b0fab71855dd02a710fa2b57928 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Pedro?= <jpedrolmail@gmail.com>
Date: Mon, 2 Oct 2017 23:17:04 +0100
Subject: [PATCH] Requested change.

---
 src/Avalonia.Controls/ProgressBar.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/ProgressBar.cs b/src/Avalonia.Controls/ProgressBar.cs
index ea75e7acda..0ff3a78c1f 100644
--- a/src/Avalonia.Controls/ProgressBar.cs
+++ b/src/Avalonia.Controls/ProgressBar.cs
@@ -112,7 +112,8 @@ namespace Avalonia.Controls
         private void UpdateIsIndeterminate(bool isIndeterminate)
         {
             if (isIndeterminate)
-                _indeterminateAnimation = IndeterminateAnimation.StartAnimation(this);
+                if (_indeterminateAnimation == null || _indeterminateAnimation.Disposed)
+                    _indeterminateAnimation = IndeterminateAnimation.StartAnimation(this);
             else
                 _indeterminateAnimation?.Dispose();
         }
@@ -127,6 +128,9 @@ namespace Avalonia.Controls
             private WeakReference<ProgressBar> _progressBar;
             private IDisposable _indeterminateBindSubscription;
             private TimeSpan _startTime;
+            private bool _disposed;
+
+            public bool Disposed => _disposed;
 
             private IndeterminateAnimation(ProgressBar progressBar)
             {
@@ -171,6 +175,7 @@ namespace Avalonia.Controls
             public void Dispose()
             {
                 _indeterminateBindSubscription?.Dispose();
+                _disposed = true;
             }
         }
     }