DefaultPdfLiteSessionProvider Class

public class DefaultPdfLiteSessionProvider : PdfLiteSessionProvider, 
	IUpdateableLiteSessionProvider

Public Class DefaultPdfLiteSessionProvider
	Inherits PdfLiteSessionProvider
	Implements IUpdateableLiteSessionProvider

using System;
using System.Collections.Concurrent;
using System.Web;

using RadPdf.Lite;

public class CustomPdfLiteSessionProvider : PdfLiteSessionProvider
{
    // This example uses an in memory dictionary, which won't have 
    // persistent storage, but a database or other key /value store
    // can easily be substituted.
    private readonly ConcurrentDictionary<string, byte[]> _dict;

    public CustomPdfLiteSessionProvider() : base()
    {
        _dict = new ConcurrentDictionary<string, byte[]>();
    }

    public override string AddSession(PdfLiteSession session)
    {
        string key = GenerateKey();

        _dict[key] = session.Serialize();

        return key;
    }

    public override PdfLiteSession GetSession(string key)
    {
        byte[] data = _dict[key];

        if (null == data)
        {
            return null;
        }

        return PdfLiteSession.Deserialize(data);
    }
}

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

using RadPdf;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddSession(); // This is important! Add the built in ASP.NET Session manager
                               // Learn more: https://learn.microsoft.com/en-us/aspnet/core/fundamentals/app-state

// Setup WebApplication
var app = builder.Build();
app.UseStaticFiles();
app.UseRouting();
app.UseSession(); // This is important! Add the built in ASP.NET Session Manager
app.UseAuthorization();

// Or however you normally process page requests
app.MapRazorPages();

// Create middleware settings
RadPdfCoreMiddlewareSettings settings = new RadPdfCoreMiddlewareSettings()
{
    // Add License Key
    LicenseKey = "DEMO",

    // No need to attach the Integration Provider!
    // The default one is already attached and uses the ASP.NET Session Manager
    // IntegrationProvider = new DefaultPdfIntegrationProvider()

    // To run RAD PDF without the System Service, add UseService = false
    // If using Lite Documents without the System Service, a LiteStorageProvider must also be implemented
    //UseService = false
};

// Add RAD PDF's middleware to app
app.UseRadPdf(settings);

app.Run();