var facilities = context.Facilities.ToList();

var facilities = context.Facilities.Select(x =>
                    new
                    {
                        x.Name,
                        x.MemberCost
                    }).ToList();

var facilities = context.Facilities.Where(x => x.MemberCost > 0).ToList();

var facilities = context.Facilities.Where(x => x.MemberCost > 0
                                                            && x.MemberCost < (x.MonthlyMaintenance / 50))
                                                    .Select(x =>
                                                        new
                                                        {
                                                            x.FacId,
                                                            x.Name,
                                                            x.MemberCost,
                                                            x.MonthlyMaintenance
                                                        }).ToList();

var facilities = context.Facilities.Where(x => x.Name.Contains("Tennis")).ToList();

int[] ids = { 1, 5 };
var facilities = context.Facilities.Where(x => ids.Contains(x.FacId)).ToList();

var facilities = context.Facilities
                        .Select(x =>
                                    new
                                    {
                                        x.Name,
                                        Cost = x.MonthlyMaintenance > 100 ? "expensive" : "cheap"
                                    }).ToList();

var date = new DateTime(2012, 09, 01);
var members = context.Members.Where(x => x.JoinDate >= date)
                                            .Select(x =>
                                                        new
                                                        {
                                                            x.MemId,
                                                            x.Surname,
                                                            x.FirstName,
                                                            x.JoinDate
                                                        }).ToList();

var members = context.Members.OrderBy(x => x.Surname)
                                            .Select(x =>
                                                        new
                                                        {
                                                            x.Surname
                                                        })
                                            .Distinct()
                                            .Take(10)
                                            .ToList();

var names = context.Members.Select(m => m.Surname).ToList()
                            .Union(context.Facilities.Select(f => f.Name).ToList()) // For now we have to use `.ToList()` here
                            .ToList();

SELECT surname
FROM members
UNION
SELECT name
FROM facilities;

var latest = context.Members.Max(x => x.JoinDate);

var latest2 = context.Members.Select(m => m.JoinDate).DefaultIfEmpty().Max();

SELECT MAX([m].[JoinDate])
FROM   (SELECT NULL AS [empty]) AS [empty]
       LEFT OUTER JOIN
       [Members] AS [m]
       ON 1 = 1;

var latest3 = context.Members.Max(m => (DateTime?)m.JoinDate) ?? DateTime.Now;

var latest4 = context.Members.OrderByDescending(m => m.JoinDate).Select(m => m.JoinDate).FirstOrDefault();

var lastMember = context.Members.OrderByDescending(m => m.JoinDate)
                            .Select(x => new { x.FirstName, x.Surname, x.JoinDate })
                            .FirstOrDefault();

var members = context.Members.Select(x => new { x.FirstName, x.Surname, x.JoinDate })
                                    .Where(x => x.JoinDate == context.Members.Max(x => x.JoinDate))
                                    .ToList();

C:\Program Files\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools\sn.exe

sn –k d:\MyKeys.snk

sn –p d:\mykeys.snk d:\mypublickey.snk

<?xml version="1.0" encoding="utf-8"?>
<license id="17d46246-a6cb-4196-98a0-ff6fc08cb67f" expiration="2012-06-12T00:00:00.0000000" type="Trial" prof="EFProf">
  <name>MyName</name>
  <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
    <SignedInfo>
      <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
      <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
      <Reference URI="">
        <Transforms>
          <Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
        </Transforms>
        <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
        <DigestValue>b8N0bDE4gTakfdGKtzDflmmyyXI=</DigestValue>
      </Reference>
    </SignedInfo>
    <SignatureValue>IPELgc9BbkD8smXSe0sGqp5vS57CtZo9ME2ZfXSq/thVu...=</SignatureValue>
  </Signature>
</license>

        public static string CreateRSAKeyPair(int dwKeySize = 1024)
        {
            using (var provider = new RSACryptoServiceProvider(dwKeySize))
            {
                return provider.ToXmlString(includePrivateParameters: true);
            }
        }

namespace SignedXmlSample
{
    public enum LicenseType
    {
        None,
        Trial,
        Standard,
        Personal
    }
}

using System;
using System.Xml.Serialization;

namespace SignedXmlSample
{
    public class License
    {
        [XmlAttribute]
        public Guid Id { set; get; }
        
        public string Domain { set; get; }

        [XmlAttribute]
        public string IssuedTo { set; get; }

        [XmlAttribute]
        public DateTime Expiration { set; get; }

        [XmlAttribute]
        public LicenseType Type { set; get; }
    }
}

using System;
using System.IO;
using System.Security.Cryptography; // needs a ref. to `System.Security.dll` asm.
using System.Security.Cryptography.Xml;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

namespace SignedXmlSample
{
    public static class LicenseGenerator
    {
        public static string CreateLicense(string licensePrivateKey, License licenseData)
        {
            using (var provider = new RSACryptoServiceProvider())
            {
                provider.FromXmlString(licensePrivateKey);
                var xmlDocument = createXmlDocument(licenseData);
                var xmlDigitalSignature = getXmlDigitalSignature(xmlDocument, provider);
                appendDigitalSignature(xmlDocument, xmlDigitalSignature);
                return xmlDocumentToString(xmlDocument);
            }
        }

        public static string CreateRSAKeyPair(int dwKeySize = 1024)
        {
            using (var provider = new RSACryptoServiceProvider(dwKeySize))
            {
                return provider.ToXmlString(includePrivateParameters: true);
            }
        }

        public static License ReadLicense(string licensePublicKey, string xmlFileContent)
        {
            var doc = new XmlDocument();
            doc.LoadXml(xmlFileContent);

            using (var provider = new RSACryptoServiceProvider())
            {
                provider.FromXmlString(licensePublicKey);

                var nsmgr = new XmlNamespaceManager(doc.NameTable);
                nsmgr.AddNamespace("sig", "http://www.w3.org/2000/09/xmldsig#");

                var xml = new SignedXml(doc);
                var signatureNode = (XmlElement)doc.SelectSingleNode("//sig:Signature", nsmgr);
                if (signatureNode == null)
                    throw new InvalidOperationException("This license file is not signed.");

                xml.LoadXml(signatureNode);
                if (!xml.CheckSignature(provider))
                    throw new InvalidOperationException("This license file is not valid.");

                var ourXml = xml.GetXml();
                if (ourXml.OwnerDocument == null || ourXml.OwnerDocument.DocumentElement == null)
                    throw new InvalidOperationException("This license file is coruppted.");

                using (var reader = new XmlNodeReader(ourXml.OwnerDocument.DocumentElement))
                {
                    var xmlSerializer = new XmlSerializer(typeof(License));
                    return (License)xmlSerializer.Deserialize(reader);
                }
            }
        }

        private static void appendDigitalSignature(XmlDocument xmlDocument, XmlNode xmlDigitalSignature)
        {
            xmlDocument.DocumentElement.AppendChild(xmlDocument.ImportNode(xmlDigitalSignature, true));
        }

        private static XmlDocument createXmlDocument(License licenseData)
        {
            var serializer = new XmlSerializer(licenseData.GetType());
            var sb = new StringBuilder();
            using (var writer = new StringWriter(sb))
            {
                var ns = new XmlSerializerNamespaces(); ns.Add("", "");
                serializer.Serialize(writer, licenseData, ns);
                var doc = new XmlDocument();
                doc.LoadXml(sb.ToString());
                return doc;
            }
        }

        private static XmlElement getXmlDigitalSignature(XmlDocument xmlDocument, AsymmetricAlgorithm key)
        {
            var xml = new SignedXml(xmlDocument) { SigningKey = key };
            var reference = new Reference { Uri = "" };
            reference.AddTransform(new XmlDsigEnvelopedSignatureTransform());
            xml.AddReference(reference);
            xml.ComputeSignature();
            return xml.GetXml();
        }

        private static string xmlDocumentToString(XmlDocument xmlDocument)
        {
            using (var ms = new MemoryStream())
            {
                var settings = new XmlWriterSettings { Indent = true, Encoding = Encoding.UTF8 };
                var xmlWriter = XmlWriter.Create(ms, settings);
                xmlDocument.Save(xmlWriter);
                ms.Position = 0;
                return new StreamReader(ms).ReadToEnd();
            }
        }
    }
}

using System;
using System.IO;

namespace SignedXmlSample
{
    class Program
    {
        static void Main(string[] args)
        {
            //Console.WriteLine(LicenseGenerator.CreateRSAKeyPair());
            writeLicense();            
            readLicense();

            Console.WriteLine("Press a key...");
            Console.ReadKey();
        }

        private static void readLicense()
        {
            var xml = File.ReadAllText("License.xml");
            const string publicKey = @"<RSAKeyValue>
                                    <Modulus>
                                        mBNKFIc/LkMfaXvLlB/+6EujPkx3vBOvLu8jdESDSQLisT8K96RaDMD1ORmdw2XNdMw/6ZBuJjLhoY13qCU9t7biuL3SIxr858oJ1RLM4PKhA/wVDcYnJXmAUuOyxP/vfvb798o6zAC1R2QWuzG+yJQR7bFmbKH0tXF/NOcSgbc=
                                    </Modulus>
                                    <Exponent>
                                        AQAB
                                    </Exponent>
                                 </RSAKeyValue>";

            var result = LicenseGenerator.ReadLicense(publicKey, xml);

            Console.WriteLine(result.Domain);
            Console.WriteLine(result.IssuedTo);
        }

        private static void writeLicense()
        {
            const string rsaData = @"<RSAKeyValue>
                    <Modulus>
                        mBNKFIc/LkMfaXvLlB/+6EujPkx3vBOvLu8jdESDSQLisT8K96RaDMD1ORmdw2XNdMw/6ZBuJjLhoY13qCU9t7biuL3SIxr858oJ1RLM4PKhA/wVDcYnJXmAUuOyxP/vfvb798o6zAC1R2QWuzG+yJQR7bFmbKH0tXF/NOcSgbc=
                    </Modulus>
                    <Exponent>
                        AQAB
                    </Exponent>
                    <P>
                        xwPKN77EcolMTD2O2Csv6k9Y4aen8UBVYjeQ4PtrNGz0Zx6I1MxLEFzRpiKC/Ney3xKg0Icwj0ebAQ04d5+HAQ==
                    </P>
                    <Q>
                        w568t0Xe6OBUfCyAuo7tTv4eLgczHntVLpjjcxdUksdVw7NJtlnOLApJVJ+U6/85Z7Ji+eVhuN91yn04pQkAtw==
                    </Q>
                    <DP>
                        svkEjRdA4WP5uoKNiHdmMshCvUQh8wKRBq/D2aAgq9fj/yxlj0FdrAxc+ZQFyk5MbPH6ry00jVWu3sY95s4PAQ==
                    </DP>
                    <DQ>
                        WcRsIUYk5oSbAGiDohiYeZlPTBvtr101V669IUFhhAGJL8cEWnOXksodoIGimzGBrD5GARrr3yRcL1GLPuCEvQ==
                    </DQ>
                    <InverseQ>
                        wIbuKBZSCioG6MHdT1jxlv6U1+Y3TX9sHED9PqGzWWpVGA+xFJmQUxoFf/SvHzwbBlXnG0DLqUvxEv+BkEid2w==
                    </InverseQ>
                    <D>                        Yk21yWdT1BfXqlw30NyN7qNWNuM/Uvh2eaRkCrhvFTckSucxs7st6qig2/RPIwwfr6yIc/bE/TRO3huQicTpC2W3aXsBI9822OOX4BdWCec2txXpSkbZW24moXu+OSHfAdYoOEN6ocR7tAGykIqENshRO7HvONJsOE5+1kF2GAE=
                    </D>
                  </RSAKeyValue>";

            string data = LicenseGenerator.CreateLicense(
                                                rsaData,
                                                new License
                                                {
                                                     Id = Guid.NewGuid(),
                                                     Domain = "dotnettips.info",
                                                     Expiration = DateTime.Now.AddYears(2),
                                                     IssuedTo = "VahidN",
                                                     Type = LicenseType.Standard
                                                });
            File.WriteAllText("License.xml", data);
        }
    }
}

dotnet new blazor --interactivity None

@page "/ssr-page/{Data:int}"

<PageTitle>An SSR component</PageTitle>

<h1>An SSR component rendered by a Minimal-API!</h1>

<div>
    Data: @Data
</div>

@code {

    [Parameter]
    public int Data { get; set; }

}

var builder = WebApplication.CreateBuilder(args);

// ...

builder.Services.AddRazorComponents();

// ...

// http://localhost:5227/ssr-component?data=2
// or it can be called directly http://localhost:5227/ssr-page/2
app.MapGet("/ssr-component",
           (int data = 1) =>
           {
               var parameters = new Dictionary<string, object?>
                                {
                                    { nameof(SsrTest.Data), data },
                                };
               return new RazorComponentResult<SsrTest>(parameters);
           });

app.UseStaticFiles();
app.UseAntiforgery();

app.MapRazorComponents<App>();
app.Run();

// ...

<LayoutView Layout="@typeof(MainLayout)">
    <PageTitle>Home</PageTitle>

    <h2>Welcome to your new app.</h2>
</LayoutView>

// ...

builder.Services.AddRazorComponents()
       .AddInteractiveServerComponents();

// ...

app.MapRazorComponents<App>().AddInteractiveServerRenderMode();

// ...

<script src="_framework/blazor.web.js"></script>

@rendermode InteractiveServer

<h1>Counter</h1>

<p role="status">Current count: @_currentCount</p>

<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>

@code {
    private int _currentCount;

    private void IncrementCount()
    {
        _currentCount++;
    }

}

// http://localhost:5227/server-interactive-component
app.MapGet("/server-interactive-component", () => new RazorComponentResult<Counter>());

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Interactive server component</title>
    <base href="/"/>
</head>
<body>
   <h1>Interactive server component</h1>

   <Counter/>

  <script src="_framework/blazor.web.js"></script>
</body>
</html>

// http://localhost:5227/server-interactive-component
app.MapGet("/server-interactive-component", () => new RazorComponentResult<CounterInteractive>());

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;

namespace WebApi8x.Services;

public class BlazorStaticRendererService
{
    private readonly HtmlRenderer _htmlRenderer;

    public BlazorStaticRendererService(HtmlRenderer htmlRenderer) => _htmlRenderer = htmlRenderer;

    public Task<string> StaticRenderComponentAsync<T>() where T : IComponent
        => RenderComponentAsync<T>(ParameterView.Empty);

    public Task<string> StaticRenderComponentAsync<T>(Dictionary<string, object?> dictionary) where T : IComponent
        => RenderComponentAsync<T>(ParameterView.FromDictionary(dictionary));

    private Task<string> RenderComponentAsync<T>(ParameterView parameters) where T : IComponent =>
        _htmlRenderer.Dispatcher.InvokeAsync(async () =>
                                             {
                                                 var output = await _htmlRenderer.RenderComponentAsync<T>(parameters);
                                                 return output.ToHtmlString();
                                             });
}

builder.Services.AddScoped<HtmlRenderer>();
builder.Services.AddScoped<BlazorStaticRendererService>();

app.MapGet("/static-renderer-service-test",
           async (BlazorStaticRendererService renderer, int data = 1) =>
           {
               var parameters = new Dictionary<string, object?>
                                {
                                    { nameof(SsrTest.Data), data },
                                };
               var html = await renderer.StaticRenderComponentAsync<SsrTest>(parameters);
               return Results.Content(html, "text/html");
           });