Environments

Startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // if we're in Development
    if (env.IsDevelopment())
    {
        // Show the Light Blue Screen of Death if there's an unhandled exception (RIP Yellow Screen of Death of ASP.NET 4)
        app.UseDeveloperExceptionPage();
    }
    else
    {
        // In any other Environment redirect the user to /Home/Error if there's an unhandled exception
        app.UseExceptionHandler("/Home/Error");
    }
}