Projektdateien hinzufügen.

V_EditorPro/MainForm.cs

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+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+
+namespace V_EditorPro
+{
+    public partial class MainForm : Form
+    {
+        public MainForm()
+        {
+            InitializeComponent();
+            this.KeyPreview = true;
+            this.KeyDown += new KeyEventHandler(MainForm_KeyDown);
+        }
+
+        private void MainForm_KeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Control && e.KeyCode == Keys.O)
+            {
+                OpenFile();
+            }
+            if (e.Control && e.KeyCode == Keys.S)
+            {
+                SaveFile();
+            }
+        }
+
+        private void openToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            OpenFile();
+        }
+
+        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            SaveFile();
+        }
+
+        private void searchReplaceToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (SearchReplaceDialog searchReplaceDialog = new SearchReplaceDialog(richTextBox1))
+            {
+                searchReplaceDialog.ShowDialog();
+            }
+        }
+
+        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            MessageBox.Show($"V_EditorPro\nVersion 1.0\nOS: {RuntimeInformation.OSDescription}", "About");
+        }
+
+        private void OpenFile()
+        {
+            OpenFileDialog openFileDialog = new OpenFileDialog();
+            if (openFileDialog.ShowDialog() == DialogResult.OK)
+            {
+                richTextBox1.Text = File.ReadAllText(openFileDialog.FileName);
+            }
+        }
+
+        private void SaveFile()
+        {
+            SaveFileDialog saveFileDialog = new SaveFileDialog();
+            saveFileDialog.FileName = $"{DateTime.Now.ToString("yyyy-MM-dd")}.txt";
+            if (saveFileDialog.ShowDialog() == DialogResult.OK)
+            {
+                File.WriteAllText(saveFileDialog.FileName, richTextBox1.Text);
+            }
+        }
+    }
+}