Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/PositiveTimeSpanValidator.cs

@@ -0,0 +1,27 @@
+//------------------------------------------------------------------------------
+// <copyright file="PositiveTimeSpanValidator.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Configuration;
+using System.ComponentModel;
+
+namespace System.Configuration {
+
+    public class PositiveTimeSpanValidator : ConfigurationValidatorBase {
+        public override bool CanValidate(Type type) {
+            return (type == typeof(TimeSpan));
+        }
+        public override void Validate(object value) {
+            if (value == null) {
+                throw new ArgumentNullException("value");
+            }
+
+            if (((TimeSpan)value) <= TimeSpan.Zero) {
+                throw new ArgumentException(SR.GetString(SR.Validator_timespan_value_must_be_positive));
+            }
+        }
+    }
+}