Add a safe point to override max lengths for existing properties.

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameDomainSharedModule.cs

@@ -26,6 +26,11 @@ namespace MyCompanyName.MyProjectName
         )]
     public class MyProjectNameDomainSharedModule : AbpModule
     {
+        public override void PreConfigureServices(ServiceConfigurationContext context)
+        {
+            MyProjectNameModulePropertyConfigurator.Configure();
+        }
+
         public override void ConfigureServices(ServiceConfigurationContext context)
         {
             Configure<AbpVirtualFileSystemOptions>(options =>

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Domain.Shared/MyProjectNameModuleExtensionConfigurator.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel.DataAnnotations;
+using Volo.Abp.Identity;
+using Volo.Abp.ObjectExtending;
+using Volo.Abp.Threading;
+
+namespace MyCompanyName.MyProjectName
+{
+    public static class MyProjectNameModulePropertyConfigurator
+    {
+        private static readonly OneTimeRunner OneTimeRunner = new OneTimeRunner();
+
+        public static void Configure()
+        {
+            OneTimeRunner.Run(() =>
+            {
+                ConfigureExistingProperties();
+            });
+        }
+
+        private static void ConfigureExistingProperties()
+        {
+            /* You can change max lengths for properties of the
+             * entities defined in the modules used by your application.
+             *
+             * Example: Change user and role name max lengths
+             
+               IdentityUserConsts.MaxNameLength = 99;
+               IdentityRoleConsts.MaxNameLength = 99;
+             
+             * Notice: It is not suggested to change property lengths
+             * unless you really need it. Go with the standard values wherever possible.
+             */
+        }
+    }
+}

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.EntityFrameworkCore/EntityFrameworkCore/MyProjectNameEfCoreEntityExtensionMappings.cs

@@ -10,6 +10,8 @@ namespace MyCompanyName.MyProjectName.EntityFrameworkCore
 
         public static void Configure()
         {
+            MyProjectNameModulePropertyConfigurator.Configure();
+            
             OneTimeRunner.Run(() =>
             {
                 /* You can configure entity extension properties for the