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I am using the ASP.NET Core MVC project and Microsoft.AspNetCore.Identity v6.0 and when I am running add migration it shows an exception

An error occurred while accessing the Microsoft.Extensions.Hosting services. Continuing without the application service provider. Error: Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ISecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SecurityStampValidator1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.ITwoFactorSecurityStampValidator Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.TwoFactorSecurityStampValidator1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserClaimsPrincipalFactory2[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.UserManager1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.SignInManager1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.SignInManager1[Microsoft.AspNetCore.Identity.IdentityUser]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.RoleManager1[Microsoft.AspNetCore.Identity.IdentityRole] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.RoleManager1[Microsoft.AspNetCore.Identity.IdentityRole]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.RoleStore3[Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserStore1[Microsoft.AspNetCore.Identity.IdentityUser] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore4[Microsoft.AspNetCore.Identity.IdentityUser,Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IRoleStore1[Microsoft.AspNetCore.Identity.IdentityRole] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.EntityFrameworkCore.RoleStore3[Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.RoleStore3[Microsoft.AspNetCore.Identity.IdentityRole,Microsoft.EntityFrameworkCore.DbContext,System.String]'.) Unable to create an object of type 'DbContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

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From the error, seems like you are missing some dependencies and the system is not able to inject the correct implementation for certain interfaces. Register missing services in the Program.cs class,

Have you added services.AddDbContext() with the correct connection settings?

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3 Comments

yes i have added var connectionString = builder.Configuration.GetConnectionString("AuthConnectionString"); builder.Services.AddDbContext<AuthDbContext>(options => options.UseSqlServer(connectionString));
@MuhammadAzibAli Do you have multiple DB Contexts? Are you running the migration command from the folder having the entities and the context?
no, I have only one DBcontext but now my web application is running

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