Summary fix

Author: alex-kulakov

Orm/Xtensive.Orm/Orm/Session.Validation.cs

@@ -1,6 +1,6 @@
-// Copyright (C) 2003-2010 Xtensive LLC.
-// All rights reserved.
-// For conditions of distribution and use, see license.
+// Copyright (C) 2008-2021 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
 // Created by: Alex Yakunin
 // Created:    2008.11.07
 
@@ -22,19 +22,13 @@ public partial class Session
     /// Validates all instances registered in <see cref="ValidationContext"/>
     /// of current <see cref="Session"/>.
     /// </summary>
-    public void Validate()
-    {
-      ValidationContext.Validate(ValidationReason.UserRequest);
-    }
+    public void Validate() => ValidationContext.Validate(ValidationReason.UserRequest);
 
     /// <summary>
     /// Validates all registered entities similar to <see cref="Validate"/> method
-    /// and returns all validation exceptions.
+    /// and returns all validation errors.
     /// </summary>
-    /// <returns>List exceptions occured during validation.</returns>
-    public IList<EntityErrorInfo> ValidateAndGetErrors()
-    {
-      return ValidationContext.ValidateAndGetErrors();
-    }
+    /// <returns>List errors occured during validation.</returns>
+    public IList<EntityErrorInfo> ValidateAndGetErrors() => ValidationContext.ValidateAndGetErrors();
   }
 }