Dialogs are a window that has certain specific function such as saving or opening a file, choosing a color, or printing a document.

Different dialog box available are:
ColorDialog: The ColorDialog (System.Windows.Forms.ColorDialog) is used when you want to pick different colors.

private void button1_Click(object sender, EventArgs e) { DialogResult result = colorDialog1.ShowDialog(); if (result == DialogResult.OK) { this.BackColor = colorDialog1.Color; } } FontDialog: The FontDialog control (System.Windows.Forms.FontDialog) is use for selecting different kinds of font and font-related properties.
private void button1_Click(object sender, EventArgs e) { DialogResult result = fontDialog1.ShowDialog(); if (result == DialogResult.OK) { textBox1.Font = fontDialog1.Font; } } OpenFileDialog: The OpenFileDialog control (System.Windows.Forms.OpenFileDialog) allows you to open and read file.
private void button1_Click(object sender, EventArgs e) { //Filter to only text files openFileDialog1.Filter = "Text Files|*.txt"; //No initial file selected openFileDialog1.FileName = String.Empty; //Open file dialog and store the returned value DialogResult result = openFileDialog1.ShowDialog(); //If Open Button was pressed if (result == DialogResult.OK) { //Create a stream which points to the file Stream fs = openFileDialog1.OpenFile(); //Create a reader using the stream StreamReader reader = new StreamReader(fs); //Read Contents textBox1.Text = reader.ReadToEnd(); //Close the reader and the stream reader.Close(); } } SaveFileDialog: The SaveFileDialog control (System.Windows.Forms.SaveFileDialog) allows you to save or write data to a specified file.
private void button1_Click(object sender, EventArgs e) { //Specify the extensions allowed saveFileDialog1.Filter = "Text File|.txt"; //Empty the FileName text box of the dialog saveFileDialog1.FileName = String.Empty; //Set default extension as .txt saveFileDialog1.DefaultExt = ".txt"; //Open the dialog and determine which button was pressed DialogResult result = saveFileDialog1.ShowDialog(); //If the user presses the Save button if (result == DialogResult.OK) { //Create a file stream using the file name FileStream fs = new FileStream(saveFileDialog1.FileName, FileMode.Create); //Create a writer that will write to the stream StreamWriter writer = new StreamWriter(fs); //Write the contents of the text box to the stream writer.Write(textBox1.Text); //Close the writer and the stream writer.Close(); } } FolderBrowserDialog: The FolderBrowserDialog contrl (System.Windows.Forms.FolderBrowserDialog) allows you to browse for a directory in your system. The control uses a tree view to show all the folders.

Property	Description
Description	Allows you to add a descriptive text above the tree view of the FolderBrowserDialog.
RootFolder	Gets or sets the folder that the FolderBrowserDialog will consider as the root or the top level folder.

private void button1_Click(object sender, EventArgs e) { DialogResult result = folderBrowserDialog1.ShowDialog(); if (result == DialogResult.OK) { //Show the path using the text box textBox1.Text = folderBrowserDialog1.SelectedPath; //Obtain information about the path DirectoryInfo selectedPath = new DirectoryInfo(textBox1.Text); //Clear the list box first listBox1.Items.Clear(); //Check if there are directories then add a label if (selectedPath.GetDirectories().Length > 0) listBox1.Items.Add("== Directories =="); //Show all the directories using the ListBox control foreach (DirectoryInfo dir in selectedPath.GetDirectories()) { //Show only the name of the directory listBox1.Items.Add(dir.Name); } //Check if there are files then add a label if (selectedPath.GetFiles().Length > 0) listBox1.Items.Add("== Files =="); //Show all the directories using the ListBox control foreach (FileInfo file in selectedPath.GetFiles()) { listBox1.Items.Add(file.Name); } } } PageSetupDialog PrintPreviewDialog PrintDialog