Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/ModelBinding/ModelError.cs

@@ -0,0 +1,34 @@
+namespace System.Web.ModelBinding {
+    using System;
+
+    [Serializable]
+    public class ModelError {
+
+        public ModelError(Exception exception)
+            : this(exception, null /* errorMessage */) {
+        }
+
+        public ModelError(Exception exception, string errorMessage)
+            : this(errorMessage) {
+            if (exception == null) {
+                throw new ArgumentNullException("exception");
+            }
+
+            Exception = exception;
+        }
+
+        public ModelError(string errorMessage) {
+            ErrorMessage = errorMessage ?? String.Empty;
+        }
+
+        public Exception Exception {
+            get;
+            private set;
+        }
+
+        public string ErrorMessage {
+            get;
+            private set;
+        }
+    }
+}