Unable to resolve service for type 'Microsoft.Extensions.Configuration.IConfiguration' while attempting to activate

Unable to resolve service for type 'Microsoft.Extensions.Configuration.IConfiguration' while attempting to activate

Resolution:

Put this line in Startup.cs file under Configuration Services Method to inject dependency as shown below:

services.AddSingleton<IConfiguration>(Configuration);

// This method gets called by the runtime. Use this method to add services to the container.
       public void ConfigureServices(IServiceCollection services)
        {
            // Add framework services.
            services.AddMvc();
           services.AddSingleton<IConfiguration>(Configuration);
            services.AddSingleton<IFirstService, FirstService>();
        }

Categories: .Net Core , Bug & Error Resolution