Add project files.

Blazor3State/Shared/LoadingContainer.razor.cs

@@ -0,0 +1,23 @@
+using Microsoft.AspNetCore.Components;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Blazor3State.Shared
+{
+    public enum LoadingContainerState { Loading, Loaded, Error }
+
+    public partial class LoadingContainer
+    {
+        [Parameter]
+        public LoadingContainerState State { get; set; }
+        [Parameter]
+        public RenderFragment Loading { get; set; }
+        [Parameter]
+        public RenderFragment Loaded { get; set; }
+        [Parameter]
+        public RenderFragment ErrorContent { get; set; }
+
+    }
+}