Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Util/AppVerifierException.cs

@@ -0,0 +1,32 @@
+namespace System.Web.Util {
+    using System;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Runtime.Serialization;
+
+    // Thrown when the AppVerifier fails an assert.
+
+    // This type is used solely as a support / diagnostics tool and will never appear over the normal course of an application.
+    // Specifically, it will never cross an AppDomain boundary, and we don't want to mark it as [Serializable] since that is
+    // essentially a public contract, and the AppVerifier feature has no public API surface. We want to retain the ability to
+    // change this feature on a whim without risk of breaking anybody.
+    [SuppressMessage("Microsoft.Usage", "CA2237:MarkISerializableTypesWithSerializable", Justification = "Doesn't need to be serializable.")]
+    internal sealed class AppVerifierException : Exception {
+
+        private readonly AppVerifierErrorCode _errorCode;
+
+        public AppVerifierException(AppVerifierErrorCode errorCode, string message)
+            : base(message) {
+
+            _errorCode = errorCode;
+        }
+
+        private AppVerifierException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+
+        public AppVerifierErrorCode ErrorCode {
+            get {
+                return _errorCode;
+            }
+        }
+
+    }
+}