CODE EXAMPLE FOR CSHARP

increase timeout in .net core web app

services.Configure<FormOptions>(options =>
{
    options.ValueLengthLimit = int.MaxValue;
    options.MultipartBodyLengthLimit = long.MaxValue; // <-- ! long.MaxValue
    options.MultipartBoundaryLengthLimit = int.MaxValue;
    options.MultipartHeadersCountLimit = int.MaxValue;
    options.MultipartHeadersLengthLimit = int.MaxValue;
});