BlazorStartupConfigureMethod.cs

public void ConfigureServices(IServiceCollection services)
{
    // Use Entity Framework in-memory provider for this sample
    services.AddDbContext<ToDoListContext>(options => options.UseInMemoryDatabase("ToDoList"));

    services.AddMvc().AddJsonOptions(options =>
    {
        options.SerializerSettings.ContractResolver = new DefaultContractResolver();
    });

    services.AddResponseCompression(options =>
    {
        options.MimeTypes = ResponseCompressionDefaults.MimeTypes.Concat(new[]
        {
            MediaTypeNames.Application.Octet,
            WasmMediaTypeNames.Application.Wasm,
        });
    });
}