asp.net core webAPI

How to pass connection string in  .net core 7

var connectionString = builder.Configuration.GetConnectionString("HotelListingConnection");
builder.Services.AddDbContext(options => { options.UseSqlServer(connectionString); });  

i'm getting error:  

The type 'HotelDbContext' cannot be used as type parameter 'TContext' in the generic type or method 'EntityFrameworkServiceCollectionExtensions.AddDbContext(IServiceCollection, Action?, ServiceLifetime, ServiceLifetime)'. There is no implicit reference conversion