C#

public delegate TResult Func<TResult>();
public delegate TResult Func<T, TResult>(T arg);
public delegate TResult Func<T1, T2, TResult>(T1 arg1, T2 arg2);
public delegate TResult Func<T1, T2, T3, TResult>(T1 arg1, T2 arg2, T3 arg3);
public delegate TResult Func<T1, T2, T3, T4, TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4);
public delegate TResult Func<T1, T2, T3, T4, T5, TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5);
public delegate TResult Func<T1, T2, T3, T4, T5, T6, TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6);

Steven Solberg wrote:

I assume the keyword TResult is arbitrary?

systemerror121 wrote:

{
get
{
return this.timeToolStripMenuItem;
}

Form1.CheckboxPublicName.Checked = false;

Error

Error	1	An object reference is required for the non-static field, method, or property 'Gadgets.Form1.CheckboxPublicName.get'	C:\Users\Kyle\documents\visual studio 2010\Projects\Gadgets\Gadgets\Time.cs	130	17	Gadgets

systemerror121 wrote:

Error 2 An object reference is required for the non-static field, method, or property 'Gadgets.Form1.CheckboxPublicName.get' C:\Users\Kyle\documents\visual studio 2010\Projects\Gadgets\Gadgets\Time.cs 130 17 Gadgets

<br />
bool result = (e.KeyData == Keys.Escape);<br />
Visible = form.CheckboxPublicName = result;

if (e.KeyData == Keys.Escape)<br />
         {<br />
           <br />
         }

// after instanciating Form2 instance (form2)
form2.RequestUncheckPublicName += form2_RequestUncheckPublicName;

//...

private void form2_RequestUncheckPublicName(object sender, EventArgs e)
{
    // As you are in Form1 you have access to all it's controls without needing to make public, static or other nasty hacks!
    // Do uncheck
}

public event EventHandler RequestUncheckPublicName;

private void Time_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyData == Keys.Escape)
    {
        Visible = false;
        OnRequestUncheckPublicName(EventArgs.Empty);
    }
} 
protected virtual void OnRequestUncheckPublicName(EventArgs e)
{
    EventHandler eh = RequestUncheckPublicName;
    if(eh != null)
        eh(this,e);
}

DaveyM69 wrote:

EventHandler eh = RequestUncheckPublicName;
if(eh != null)
eh(this,e);

code

public static ToolStripMenuItem CheckboxPublicName<br />
        {<br />
            get<br />
            {<br />
                return this.timeToolStripMenuItem;<br />
            }<br />
        }

Location Of Error

The Error

Error	1	Keyword 'this' is not valid in a static property, static method, or static field initializer	C:\Users\Kyle\documents\visual studio 2010\Projects\Gadgets\Gadgets\Form1.cs	41	24	Gadgets<br />

Error	1	An object reference is required for the non-static field, method, or property 'Gadgets.Form1.CheckboxPublicName.get'	C:\Users\Kyle\documents\visual studio 2010\Projects\Gadgets\Gadgets\Time.cs	130	17	Gadgets

// Form1.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form1 : Form
    {
        // This would normally reside in the designer
        private Label label;

        public Form1()
        {
            InitializeComponent();
            CreateLabel();
            Form2 form2 = new Form2();
            form2.RequestDisable += new EventHandler(form2_RequestDisable);
            form2.Show();
        }

        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateLabel()
        {
            label = new Label();
            label.Location = new Point(12, 12);
            label.Text = "Disable Me";
            Controls.Add(label);
        }
        private void form2_RequestDisable(object sender, EventArgs e)
        {
            label.Enabled = false;
        }
    }
}

// Form2.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form2 : Form
    {
        public event EventHandler RequestDisable;

        // This would normally reside in the designer
        private Button buttonDisable;

        public Form2()
        {
            InitializeComponent();
            CreateButtonDisable();
        }

        private void buttonDisable_Click(object sender, EventArgs e)
        {
            OnRequestDisable(EventArgs.Empty);
        }
        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateButtonDisable()
        {
            buttonDisable = new Button();
            buttonDisable.Location = new Point(12, 12);
            buttonDisable.Text = "&Disable";
            buttonDisable.Click += new EventHandler(buttonDisable_Click);
            Controls.Add(buttonDisable);
            AcceptButton = buttonDisable;
        }
        protected virtual void OnRequestDisable(EventArgs e)
        {
            EventHandler eh = RequestDisable;
            if (eh != null)
                eh(this, e);
        }
    }
}

// Form1.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form1 : Form
    {
        // This would normally reside in the designer
        private Label label;

        public Form1()
        {
            InitializeComponent();
            CreateLabel();
            Form2 form2 = new Form2(label);
            form2.Show();
        }

        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateLabel()
        {
            label = new Label();
            label.Location = new Point(12, 12);
            label.Text = "Disable Me";
            Controls.Add(label);
        }
    }
}

// Form2.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form2 : Form
    {
        // This would normally reside in the designer
        private Button buttonDisable;

        private Control controlToDisable;

        public Form2(Control controlToDisable)
        {
            InitializeComponent();
            CreateButtonDisable();
            this.controlToDisable = controlToDisable;
        }

        private void buttonDisable_Click(object sender, EventArgs e)
        {
            controlToDisable.Enabled = false;
        }
        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateButtonDisable()
        {
            buttonDisable = new Button();
            buttonDisable.Location = new Point(12, 12);
            buttonDisable.Text = "&Disable";
            buttonDisable.Click += new EventHandler(buttonDisable_Click);
            Controls.Add(buttonDisable);
            AcceptButton = buttonDisable;
        }
    }
}

// Form1.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form1 : Form
    {
        // This would normally reside in the designer
        private static Label label;

        public Form1()
        {
            InitializeComponent();
            CreateLabel();
            Form2 form2 = new Form2();
            form2.Show();
        }

        public static Label Label
        {
            get { return label; }
        }

        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateLabel()
        {
            label = new Label();
            label.Location = new Point(12, 12);
            label.Text = "Disable Me";
            Controls.Add(label);
        }
    }
}

// Form2.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace FormsDemo
{
    public partial class Form2 : Form
    {
        // This would normally reside in the designer
        private Button buttonDisable;

        public Form2()
        {
            InitializeComponent();
            CreateButtonDisable();
        }

        private void buttonDisable_Click(object sender, EventArgs e)
        {
            Form1.Label.Enabled = false;
        }
        // This stuff would normally reside inside InitializeComponent in the designer
        private void CreateButtonDisable()
        {
            buttonDisable = new Button();
            buttonDisable.Location = new Point(12, 12);
            buttonDisable.Text = "&Disable";
            buttonDisable.Click += new EventHandler(buttonDisable_Click);
            Controls.Add(buttonDisable);
            AcceptButton = buttonDisable;
        }
    }
}