.NET (Core and Framework)

Public Function Firma(ByVal XmlFile as String) As Boolean
Dim signedXML as String = "c:\signedXML.xml"
    ' setup the document to sign 
    Dim doc As XmlDocument = New XmlDocument()
    doc.Load(XmlFile)
    Dim signer As SignedXml = New SignedXml(doc)

    'setup the key used to sign 
    Dim key As Security.Cryptography.RSA = New Security.Cryptography.RSACryptoServiceProvider()
    signer.KeyInfo = New Security.Cryptography.Xml.KeyInfo()

    signer.KeyInfo.AddClause(New Security.Cryptography.Xml.RSAKeyValue(key))
    signer.SigningKey = key

    'create a reference to the root of the document 
    Dim orderRef As Security.Cryptography.Xml.Reference = New Security.Cryptography.Xml.Reference("")
    orderRef.AddTransform(New Security.Cryptography.Xml.XmlDsigEnvelopedSignatureTransform())
    orderRef.DigestMethod = "http://www.w3.org/2001/04/xmlenc#sha256"

    signer.AddReference(orderRef)

    'add transforms that only select the order items, type, and 
    'compute the signature, and add it to the document 
    signer.ComputeSignature()
    doc.DocumentElement.AppendChild(signer.GetXml())
    doc.Save(signedXML)
End Function

class ObjectA {
    public Image ImageA;
}
class ObjectB : IDisposable {
    public Image ImageB;
    otherDisposableStuff;
    public ObjectB() {
       // Loads ImageB
    }
    void Dispose() {
        ImageB.Dispose();
        otherDisposableStuff.Dispose();
    }
} 
ObjectA objA = new ObjectA();

SomeMethod() {
    ObjectB objB = new ObjectB();
    objA.ImageA = objB.ImageB;
}

class FixedHeightControlDesigner : ControlDesigner {
    FixedHeightControlDesigner() {
        AutoResizeHandles = true;
    }
    public override SelectionRules SelectionRules {
        get {
            return SelectionRules.LeftSizeable | SelectionRules.RightSizeable | SelectionRules.Moveable;
        }
    }
}

using WPFLibrary;

namespace Caller
{
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            SampleWindow wnd = new SampleWindow();
            wnd.ShowDialog();
        }
     }
 }

namespace WPFLibrary
{   
    public partial class SampleWindow : Window
    {       
        public SampleWindow()
        {
            InitializeComponent();
        }
   }
}

Background of this question: