Update NBXplorer

BTCPayServer/SynchronizationContextRemover.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace BTCPayServer
+{
+    public struct SynchronizationContextRemover : INotifyCompletion
+    {
+        public bool IsCompleted => SynchronizationContext.Current == null;
+
+        public void OnCompleted(Action continuation)
+        {
+            var prev = SynchronizationContext.Current;
+            try
+            {
+                SynchronizationContext.SetSynchronizationContext(null);
+                continuation();
+            }
+            finally
+            {
+                SynchronizationContext.SetSynchronizationContext(prev);
+            }
+        }
+
+        public SynchronizationContextRemover GetAwaiter()
+        {
+            return this;
+        }
+
+        public void GetResult()
+        {
+        }
+    }
+}