Move `EnableLegacyTimestampBehavior` to `AbpDbContext`.

framework/src/Volo.Abp.EntityFrameworkCore.PostgreSql/Volo/Abp/EntityFrameworkCore/PostgreSql/AbpEntityFrameworkCorePostgreSqlModule.cs

@@ -1,5 +1,4 @@
-using System;
-using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection;
 using Volo.Abp.EntityFrameworkCore.DistributedEvents;
 using Volo.Abp.Guids;
 using Volo.Abp.Modularity;
@@ -11,12 +10,6 @@ namespace Volo.Abp.EntityFrameworkCore.PostgreSql;
     )]
 public class AbpEntityFrameworkCorePostgreSqlModule : AbpModule
 {
-    public override void PreConfigureServices(ServiceConfigurationContext context)
-    {
-        // https://www.npgsql.org/efcore/release-notes/6.0.html#opting-out-of-the-new-timestamp-mapping-logic
-        AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
-    }
-
     public override void ConfigureServices(ServiceConfigurationContext context)
     {
         Configure<AbpSequentialGuidGeneratorOptions>(options =>

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs

@@ -122,6 +122,12 @@ public abstract class AbpDbContext<TDbContext> : DbContext, IAbpEfCoreDbContext,
         if (provider != null)
         {
             modelBuilder.SetDatabaseProvider(provider.Value);
+
+            if (provider.Value == EfCoreDatabaseProvider.PostgreSql)
+            {
+                // https://www.npgsql.org/efcore/release-notes/6.0.html#opting-out-of-the-new-timestamp-mapping-logic
+                AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+            }
         }
     }