Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/ValidationSettings.cs

@@ -0,0 +1,38 @@
+using System.Configuration;
+using System.Web.Util;
+
+namespace System.Web.UI {
+    public static class ValidationSettings {
+
+        private static UnobtrusiveValidationMode? _unobtrusiveValidationMode;
+
+        /// <summary>
+        /// Gets or sets the client side validation mode of the application.
+        /// </summary>
+        public static UnobtrusiveValidationMode UnobtrusiveValidationMode {
+            get {
+                if (_unobtrusiveValidationMode == null) {
+                    
+                    string configValue = ConfigurationManager.AppSettings["ValidationSettings:UnobtrusiveValidationMode"];
+                    object value = PropertyConverter.EnumFromString(typeof(UnobtrusiveValidationMode), configValue);
+                    
+                    if (value == null) {
+                        _unobtrusiveValidationMode = (BinaryCompatibility.Current.TargetsAtLeastFramework45) ? UnobtrusiveValidationMode.WebForms : UnobtrusiveValidationMode.None;
+                    }
+                    else {
+                        Debug.Assert(value is UnobtrusiveValidationMode);
+                        _unobtrusiveValidationMode = (UnobtrusiveValidationMode)value;
+                    }
+                }
+                return _unobtrusiveValidationMode.Value;
+            }
+            set {
+                if (value < UnobtrusiveValidationMode.None || value > UnobtrusiveValidationMode.WebForms) {
+                    throw new ArgumentOutOfRangeException("value");
+                }
+
+                _unobtrusiveValidationMode = value;
+            }
+        }
+    }
+}