Added dialog system

Added surface delete

src/Artemis.UI/Stylet/FluentValidationAdapter.cs

@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using FluentValidation;
+using Stylet;
+
+namespace Artemis.UI.Stylet
+{
+    public class FluentValidationAdapter<T> : IModelValidator<T>
+    {
+        private readonly IValidator<T> _validator;
+        private T _subject;
+
+        public FluentValidationAdapter(IValidator<T> validator)
+        {
+            _validator = validator;
+        }
+
+        public void Initialize(object subject)
+        {
+            _subject = (T) subject;
+        }
+
+        public async Task<IEnumerable<string>> ValidatePropertyAsync(string propertyName)
+        {
+            // If someone's calling us synchronously, and ValidationAsync does not complete synchronously,
+            // we'll deadlock unless we continue on another thread.
+            return (await _validator.ValidateAsync(_subject, CancellationToken.None, propertyName).ConfigureAwait(false))
+                .Errors.Select(x => x.ErrorMessage);
+        }
+
+        public async Task<Dictionary<string, IEnumerable<string>>> ValidateAllPropertiesAsync()
+        {
+            // If someone's calling us synchronously, and ValidationAsync does not complete synchronously,
+            // we'll deadlock unless we continue on another thread.
+            return (await _validator.ValidateAsync(_subject).ConfigureAwait(false))
+                .Errors.GroupBy(x => x.PropertyName)
+                .ToDictionary(x => x.Key, x => x.Select(failure => failure.ErrorMessage));
+        }
+    }
+}