MaxRequestBodySize.cs

// If you are using **IIS Express** as host, then use `Server features` to increase the `MaxRequestBodySize`

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
    	app.Use(async (context, next) =>
    	{
    		context.Features.Get<IHttpMaxRequestBodySizeFeature>().MaxRequestBodySize = null; // unlimited I guess
    		await next.Invoke();
    	});
    }


// If you are using **Kestrel**:

    public static IHostBuilder CreateHostBuilder(string[] args) =>
    					Host.CreateDefaultBuilder(args)
    					.ConfigureWebHostDefaults(webBuilder =>
    					{
    						webBuilder.UseStartup<Startup>.UseKestrel(o => o.Limits.MaxRequestBodySize = null);
    					});

// If you are using **IIS** --> **web.config**:
// This sample contains dummy values, configure them appropriately.

    <?xml version="1.0" encoding="utf-8"?>
    <configuration>
      <system.web>
        <httpRuntime maxRequestLength="2073741824" /> // kbytes
      </system.web>
      <system.webServer>
        <security>
          <requestFiltering>
            <requestLimits maxAllowedContentLength="2073741824" /> // bytes
          </requestFiltering>
        </security>
      </system.webServer>
    </configuration>

// ---------------------------------------------------------------------------------------------------------------
// The server feature `FormOptions` can also be set! But when and where does it apply?
 public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<FormOptions>(x =>
            {
                x.ValueLengthLimit = int.MaxValue;
                x.MultipartBodyLengthLimit = int.MaxValue;
                x.MultipartBoundaryLengthLimit = int.MaxValue;
                x.MultipartHeadersCountLimit = int.MaxValue;
                x.MultipartHeadersLengthLimit = int.MaxValue;
            });