Add missing XML docs

src/EFCore.SqlServer/Storage/Internal/SqlServerTransaction.cs

@@ -11,6 +11,12 @@
 
 namespace Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal
 {
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class SqlServerTransaction : RelationalTransaction, IDbContextTransaction
     {
         private readonly DbTransaction _dbTransaction;

src/EFCore.SqlServer/Storage/Internal/SqlServerTransactionFactory.cs

@@ -8,6 +8,12 @@
 
 namespace Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal
 {
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class SqlServerTransactionFactory : IRelationalTransactionFactory
     {
         /// <summary>

src/EFCore.Sqlite.Core/Storage/Internal/SqliteTransaction.cs

@@ -11,6 +11,12 @@
 
 namespace Microsoft.EntityFrameworkCore.Sqlite.Storage.Internal
 {
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class SqliteTransaction : RelationalTransaction, IDbContextTransaction
     {
         private readonly DbTransaction _dbTransaction;

src/EFCore.Sqlite.Core/Storage/Internal/SqliteTransactionFactory.cs

@@ -8,6 +8,12 @@
 
 namespace Microsoft.EntityFrameworkCore.Sqlite.Storage.Internal
 {
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
     public class SqliteTransactionFactory : IRelationalTransactionFactory
     {
         /// <summary>