C#

Dictionary<int,> dicA = new Dictionary<int,>();
dicA.Add(1, 10);
dicA.Add(2, 20);
dicA.Add(3, 30);

Dictionary<int,> dicB = new Dictionary<int,>();
dicB.Add(3, 35);
dicB.Add(4, 40);
dicB.Add(5, 50);

var newDic = dicA.Union(dicB);

public bool ShowThing
{
get { return picturebox1.Visible; }
set { picturebox1.Visible = value; }
}

public partial class LabeledTextBox : UserControl
{
    public bool TextMultiLine
    {
        get { return txtText.Multiline; }
        set { txtText.Multiline = value; }
    }
}

public partial class frmMain : Form
{
    public frmMain()
    {
        InitializeComponent();
        LabeldTextBox ltxt = new LabeledTextBox();
        
        ltxt.TextMultiLine = true; // And it works in runtime and everywhere else
    }
}

private bool ShowThing = true;

I are troll

[Browsable(true)]
public bool TextMultiLine
{
        get { return txtText.Multiline; }
        set { txtText.Multiline = value; }
}

I are troll

string data = "my mother,the car,"other stuff,'my,other,stuff'",lastfield;
StringParser parser = new StringParser(data, ",", "\"");
string quotedField = parser.GetField(2);
StringParser parser2 = new StringParser(quotedField, ",", "\'");