Environment.SpecialFolder.CommonApplicationData

 private void button1_Click(object sender, EventArgs e)
        {
            var path=Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
            MessageBox.Show("路径："+path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe",dir);

        }

        private void button2_Click(object sender, EventArgs e)
        {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles);
            MessageBox.Show("路径：" + path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe",dir);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
            MessageBox.Show("路径：" + path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe",dir);
        }

        private void button4_Click(object sender, EventArgs e)
        {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.System);
            MessageBox.Show("路径：" + path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe", dir);
        }

        private void button5_Click(object sender, EventArgs e)
        {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            MessageBox.Show("路径：" + path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe", dir);
        }

        private void button6_Click(object sender, EventArgs e)
        {
            var path = Environment.GetFolderPath(Environment.SpecialFolder.Windows);
            MessageBox.Show("路径：" + path);
            var dir = path + "\\edutools\\";
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            Process.Start("explorer.exe", dir);
        }

测试结果：

在未授予Administrator权限的的Win7 32位上（不打勾，表示无法创建成功）：