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string path = Directory.GetCurrentDirectory() + "\\Getränke\\";
Directory.CreateDirectory(path);
Properties.Settings.Default.HauptPfad = path;
Properties.Settings.Default.Save();					

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File.WriteAllText(path + *, this.textBox1.Text);					

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File.WriteAllText(path + "datei.txt", textBox1.Text);					

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string filename = path.Combine(path, "datei.txt");
File.WriteAllText(filename, textBox1.Text);					

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 private void button2_Click(object sender, EventArgs e)
        {
            path = Directory.GetCurrentDirectory();
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            string path1 = Path.Combine(path + this.textBox1.Text);
            if(!File.Exists(path1))
            {
                File.WriteAllText(path1 , this.textBox1.Text);
            }
        }					

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 private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyData  ==( Keys.F1|Keys.Alt))
                this.WindowState = FormWindowState.Minimized;
            else if (e.KeyData == (Keys.F2|Keys.Alt))
                this.WindowState = FormWindowState.Normal;

        }