创建xml对应的对象类

根节点，对应类名

[XmlRoot("ComponentLog ")]

public class ComponentLog{

}

其他节点，对应属性名

[XmlElement("LogCategory")]

public string logCategory { get; set; }

也可以对应集合(如果同一节点有多个的话)

[XmlElement("LogContent")]

public List<LogContent> logContent { get; set; }

节点里的内容

[XmlAttribute("Content")]

public string content { get; set; }

XML文件：

<?xml version="1.0" encoding="utf-8"?>

<ComponentLog>

         <LogCategory>Sign</LogCategory>

         <LogContent>

        <Key>1</Key>

        <ContentCaption Content="内容1" VariableName=""/>

        <ContentDetail Content="内容2" VariableName="" />

    </LogContent>

         <LogContent>

        <Key>2</Key>

        <ContentCaption Content="内容3" VariableName=""/>

        <ContentDetail Content="内容4" VariableName="" />

</LogContent>

</ComponentLog>

窗体中打开文件夹

FolderBrowserDialog  folderBrowser = new  FolderBrowserDialog();

    if (folderBrowser.ShowDialog() == DialogResult.OK)

    {

      txtFolderPath.Text = folderBrowser.SelectedPath;

     }

窗体中跨线程调用组件(控件)

        /// <param name="textBox">文本框</param>

        /// <param name="strText">要显示的内容</param>

        private void ShowText(TextBox textBox, String strText)

        {

            if (this.InvokeRequired)

            {

                this.Invoke((MethodInvoker)delegate () { ShowText(textBox, strText+"\r\n"); });

            }

            else

            {

                textBox.Text += DateTime.Now + "   " + strText+"\r\n";

            }

        }

关闭窗口，退出所有进程

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)

        {

            System.Environment.Exit(0);

        }

将文本框的滚动条一直处于最低端

        private void txtReceive_TextChanged(object sender, EventArgs e)

        {

            txtReceive.SelectionStart = txtReceive.Text.Length;

            txtReceive.ScrollToCaret();

        }

连接字符串

//str1不为空，就将str1和“ ”连接

string journalString = str1 != string.Empty ? string.Concat(str1, " ") : string.Empty;

获得程序运行目录下指定文件的路径

string xmlPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "JournalLog\\123.xml");

获取指定的编码格式

Encoding gb2312 = Encoding.GetEncoding("GB2312");

按照指定编码格式读取文本内容

string strRead = File.ReadAllText(xmlPath,Encoding.Default);

按照指定编码格式转换已经读取到的文本内容

//sendByte是字节，将其转换成string

string  strSendData = gb2312.GetString(sendByte); 

或者string  strSendData = Encoding.UTF8.GetString(sendByte);