Unable to resolve service for type Microsoft AspNetCore Session ISessionStore

This post shows you How to fix 'Unable to resolve service for type Microsoft AspNetCore Session ISessionStore' in ASP.NET Core.

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Session.ISessionStore' while attempting to activate 'Microsoft.AspNetCore.Session.SessionMiddleware'.

Open the Startup.cs class, then add the following c# code to ConfigureServices method.

services.AddMvc().AddSessionStateTempDataProvider();
services.AddSession();

You can solve the problem 'Unable to resolve service for type Microsoft AspNetCore Session ISessionStore' as shown below.

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<CookiePolicyOptions>(options =>
    {
        // This lambda determines whether user consent for non-essential cookies is needed for a given request.
        options.CheckConsentNeeded = context => true;
        options.MinimumSameSitePolicy = SameSiteMode.None;
    });

    services.AddMvc().AddSessionStateTempDataProvider();
    services.AddSession();
    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Latest);
}