Add ISession.Id

src/Microsoft.AspNetCore.Http.Features/ISession.cs

@@ -8,6 +8,10 @@ namespace Microsoft.AspNetCore.Http.Features
 {
     public interface ISession
     {
+        string Id { get; }
+
+        IEnumerable<string> Keys { get; }
+
         Task LoadAsync();
 
         Task CommitAsync();
@@ -19,7 +23,5 @@ namespace Microsoft.AspNetCore.Http.Features
         void Remove(string key);
 
         void Clear();
-
-        IEnumerable<string> Keys { get; }
     }
 }

test/Microsoft.AspNetCore.Http.Tests/DefaultHttpContextTests.cs

@@ -288,6 +288,8 @@ namespace Microsoft.AspNetCore.Http.Internal
             private Dictionary<string, byte[]> _store
                 = new Dictionary<string, byte[]>(StringComparer.OrdinalIgnoreCase);
 
+            public string Id { get; set; }
+
             public IEnumerable<string> Keys { get { return _store.Keys; } }
 
             public void Clear()