Imported Upstream version 5.14.0.125

Former-commit-id: 436f655dff8d8f7c7b0eb3cb3c65e14ccf98b295

mcs/class/System.Runtime.Serialization/corefx/DiagnosticUtility.cs

@@ -0,0 +1,31 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+
+namespace System.Runtime.Serialization
+{
+    partial class DiagnosticUtility
+    {
+        internal static bool IsFatal(Exception exception)
+        {
+            while (exception != null)
+            {
+                // These exceptions aren't themselves fatal, but since the CLR uses them to wrap other exceptions,
+                // we want to check to see whether they've been used to wrap a fatal exception.  If so, then they
+                // count as fatal.
+                if (exception is TypeInitializationException)
+                {
+                    exception = exception.InnerException;
+                }
+                else
+                {
+                    break;
+                }
+            }
+
+            return false;
+        }
+    }
+}