CS0311 C# The type cannot be used as type parameter 'TContext' in the generic type or method. EntityFrameworkCore

I specify the context class I created in the entity project on the Startup.cs file and the connectionString data I created for connectionString. But why am I getting this error?

ERROR message:
Severity Code Description Project File Line Suppression State
Error CS0311 The type
‘Microsoft.ApplicationInsights.Extensibility.Implementation.UserContext’
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 from
‘Microsoft.ApplicationInsights.Extensibility.Implementation.UserContext’
to
‘Microsoft.EntityFrameworkCore.DbContext’. EntityFramework2 C:UsersxsamusourcereposEntityFramework2EntityFramework2Startup.cs 29 Active

Startup class:

namespace EntityFramework2
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
            services.AddDbContext<UserContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DevConnection")));
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}

Entity configuration:

namespace EntityFramework2
{
    public class EntityConfiguration : IEntityTypeConfiguration<User>
    {
        public void Configure(EntityTypeBuilder<User> builder)
        {
            builder.HasOne<Department>(navigationExpression: s => s.Name)
                .WithOne(sa => sa.User)
                .HasForeignKey<Department>(sa => sa.DepartmentId);

            builder.HasOne<Title>(navigationExpression: s => s.TitleCode)
               .WithOne(sa => sa.User)
               .HasForeignKey<Title>(sa => sa.TitleId);

            builder.HasOne<Position>(navigationExpression: s => s.PositionCode)
               .WithOne(sa => sa.User)
               .HasForeignKey<Position>(sa => sa.PositionId);
        }
    }
}

public class UserContext : DbContext
{
    public UserContext (DbContextOptions<UserContext > options)
        : base(options)
    { }

    public DbSet<User> Users{ get; set; }
}

public class BloggingContext : DbContext
{
    public BloggingContext(DbContextOptions<BloggingContext> options)
        : base(options)
    { }

    public DbSet<Blog> Blogs { get; set; }
}