(B) Add transactions to unit of work

Clinics.Backend/API/Program.cs

@@ -21,9 +21,9 @@ builder.Services.AddDbContext<ClinicsDbContext>(
 
         dbContectOptionsBuilder.UseSqlServer(databaseOptions.ConnectionString, sqlServerAction =>
         {
-            sqlServerAction.EnableRetryOnFailure(databaseOptions.MaxRetryCount);
+            //sqlServerAction.EnableRetryOnFailure(databaseOptions.MaxRetryCount);
 
-            sqlServerAction.CommandTimeout(databaseOptions.CommandTimeout);
+            //sqlServerAction.CommandTimeout(databaseOptions.CommandTimeout);
         });
 
         // Be careful with this option, true only in development process!

Clinics.Backend/Domain/UnitOfWork/IUnitOfWork.cs

-namespace Domain.UnitOfWork;
+using System.Data;
+
+namespace Domain.UnitOfWork;
 
 public interface IUnitOfWork
 {
     public Task SaveChangesAsync();
+
+    public IDbTransaction BeginTransaction();
+    // Note that type "IDbTranaction" is from System.Data
+        // i.e. It's not related to any database system
 }

Clinics.Backend/Persistence/UnitOfWork/UnitOfWork.cs

 using Domain.UnitOfWork;
+using Microsoft.EntityFrameworkCore.Storage;
 using Persistence.Context;
+using System.Data;
 
 namespace Persistence.UnitOfWork;
 
@@ -12,6 +14,12 @@ public class UnitOfWork : IUnitOfWork
         _context = context;
     }
 
+    public IDbTransaction BeginTransaction()
+    {
+        var transaction = _context.Database.BeginTransaction();
+        return transaction.GetDbTransaction();
+    }
+
     public async Task SaveChangesAsync()
     {
         try