Opacity of Forms in C#

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Introduction

In C# we can access to opacity of WinForm by Opacity property .
This article shows you how we can do it by a simple project.

Using the code

System.Windows.Forms.Timer

We'd like to make fade-in and fade-out effect in our WinForm.
To do that we used System.Windows.Forms.Timer .

We used three Timers in our project :
TimerFadein : Shows WinApp with fade-in effect.
TimerFadein runs below method in its Tick event.

private void TimerFadein_Tick(object sender, EventArgs e)
{
    //Prevents Timers overlapping 
    if (timerHalfFadeOut.Enabled || TimerFadeout.Enabled)
    {
        TimerFadein.Enabled = false;
        return;
    }
    timerRunning = true;
    //\\
    this.Opacity += 0.05;
    if (this.Opacity >= 0.95)
    {
        this.Opacity = 1;
        timerRunning = TimerFadein.Enabled = false;
    }
    maskedTextBoxOpacity.Text = (this.Opacity * 100).ToString();
    hScrollBar1.Value = (int)(this.Opacity * 100);
}

TimerFadeout : Shows WinApp with fade-out effect.
TimerFadeout runs below method in its Tick event.

private void TimerFadeout_Tick(object sender, EventArgs e)
{
    //Prevents Timers overlapping
    if (timerHalfFadeOut.Enabled || TimerFadein.Enabled)
    {
        TimerFadeout.Enabled = false;
        return;
    }
    timerRunning = true;
    //\\
    this.Opacity -= 0.05;
    if (this.Opacity <= 0.05)
    {
        this.Opacity = 0;
        Application.ExitThread();
    }
    maskedTextBoxOpacity.Text = (this.Opacity * 100).ToString();
    hScrollBar1.Value = (int)(this.Opacity * 100);
}

timerHalfFadeOut : Shows WinApp with 0.5 opacity and fade-out effect.
timerHalfFadeOut runs below method in its Tick event.

private void timerHalfFadeOut_Tick(object sender, EventArgs e)
{
    //Prevents Timers overlapping
    if (TimerFadeout.Enabled || TimerFadein.Enabled)
    {
        timerHalfFadeOut.Enabled = false;
        return;
    }
    timerRunning = true;
    //\\
    this.Opacity -= 0.05;
    if (this.Opacity <= 0.50)
    {
        this.Opacity = 0.5;
        timerRunning = timerHalfFadeOut.Enabled = false;
    }
    maskedTextBoxOpacity.Text = (this.Opacity * 100).ToString();
    hScrollBar1.Value = (int)(this.Opacity * 100);
}

Running WinApp with Fade-in effect

We'd like to show our project with fade-in effect thus we must change opacity of our Form to zero in constructor method .
We must enable TimerFadein too , to show our WinApp with fade-in effect.

public Form1()
{
    InitializeComponent();
    this.Opacity = 0;
    TimerFadein.Enabled = true;
}

Well, other things (like closing WinApp and fade-out effect) are very similar with above method .
Only we must enable or disable Timers.
See source code.
Good luck