c# NameValueCollection class reads configuration information

I will first introduce the writing method in the configuration file:
1.Create a config file under the project in VS2005, name is, and edited as follows:

Copy the codeThe code is as follows:

<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
<configSections> 
<section 
name="StartParameters" 
type=",System, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/> 
</configSections> 
<StartParameters> 
<add key="IPAddress" value="127.0.0.1"/> 
<add key="Port" value="13000"/> 
</StartParameters> 
</configuration> 

The name value of the section node is defined by itself. Here I define it as "StartParameters", then add the node declared above, and add two test items "<add key="IPAddress" value="127.0.0.1"/>" and "<add key="Port" value="13000"/>" inside the node; the configuration file is defined.

2. Open the code file to read the configuration information and add two references, namely:

Copy the codeThe code is as follows:

using ; 
using ; 

Define a variable of type NameValueCollection:

Copy the codeThe code is as follows:

NameValueCollection _table = null; 
_table = (NameValueCollection)("StartParameters"); 
String ipAddress ＝_table["IPAddress"].ToString(); 
String port = _table["Port"].ToString(); 

The "StartParameters" in the previous sentence is the name value defined in the configuration file.
The output values of ipAddress and port are:

Copy the codeThe code is as follows:

“127.0.0.1” 
“13000” 