update httpcontextbase and wrapper

Author: Ruoyun Tang

src/Microsoft.AspNetCore.SystemWebAdapters/Generated/Ref.Standard.cs

@@ -186,6 +186,7 @@ public partial class HttpContextBase : System.IServiceProvider
         public virtual void RewritePath(string path, bool rebaseClientPath) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
         public virtual void RewritePath(string filePath, string pathInfo, string queryString) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
         public virtual void RewritePath(string filePath, string pathInfo, string queryString, bool setClientFilePath) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
+        public virtual void SetSessionStateBehavior(System.Web.SessionState.SessionStateBehavior sessionStateBehavior) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
     }
     public partial class HttpContextWrapper : System.Web.HttpContextBase
     {
@@ -211,6 +212,7 @@ public partial class HttpContextWrapper : System.Web.HttpContextBase
         public override void RewritePath(string path, bool rebaseClientPath) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
         public override void RewritePath(string filePath, string pathInfo, string queryString) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
         public override void RewritePath(string filePath, string pathInfo, string queryString, bool setClientFilePath) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
+        public override void SetSessionStateBehavior(System.Web.SessionState.SessionStateBehavior sessionStateBehavior) { throw new System.PlatformNotSupportedException("Only supported when running on ASP.NET Core or System.Web");}
     }
     public sealed partial class HttpCookie
     {

src/Microsoft.AspNetCore.SystemWebAdapters/HttpContext.cs

@@ -166,6 +166,18 @@ public ISubscriptionToken DisposeOnPipelineCompleted(IDisposable target)
         _context.Response.RegisterForDispose(token);
         return token;
     }
+    public void SetSessionStateBehavior(SessionStateBehavior sessionStateBehavior)
+    {
+        if (_context.Features.Get<ISessionStateFeature>() is { } feature)
+        {
+            feature.State = sessionStateBehavior;
+        }
+        else
+        {
+            var newFeature = new SessionStateFeature() { State = sessionStateBehavior };
+            _context.Features.Set<ISessionStateFeature>(newFeature);
+        }
+    }
 
     [return: NotNullIfNotNull(nameof(context))]
     public static implicit operator HttpContext?(HttpContextCore? context) => context?.GetAdapter();

src/Microsoft.AspNetCore.SystemWebAdapters/HttpContextBase.cs

@@ -4,6 +4,7 @@
 using System.Collections;
 using System.Security.Principal;
 using System.Diagnostics.CodeAnalysis;
+using System.Web.SessionState;
 using Microsoft.AspNetCore.SystemWebAdapters;
 
 namespace System.Web
@@ -67,5 +68,7 @@ public virtual IPrincipal User
         public virtual void RewritePath(string filePath, string pathInfo, string? queryString) => throw new NotImplementedException();
 
         public virtual void RewritePath(string filePath, string pathInfo, string? queryString, bool setClientFilePath) => throw new NotImplementedException();
+
+        public virtual void SetSessionStateBehavior(SessionStateBehavior sessionStateBehavior) => throw new NotImplementedException();
     }
 }

src/Microsoft.AspNetCore.SystemWebAdapters/HttpContextWrapper.cs

@@ -79,5 +79,7 @@ public override IPrincipal User
         public override void RewritePath(string filePath, string pathInfo, string? queryString) => _context.RewritePath(filePath, pathInfo, queryString);
 
         public override void RewritePath(string filePath, string pathInfo, string? queryString, bool setClientFilePath) => _context.RewritePath(filePath, pathInfo, queryString, setClientFilePath);
+
+        public override void SetSessionStateBehavior(SessionStateBehavior sessionStateBehavior) => _context.SetSessionStateBehavior(sessionStateBehavior);
     }
 }