C# 修改配置文件app.config

01

bool

isModified
=

false

;

02

foreach

(

string

key

in

ConfigurationManager.AppSettings)

03

{

04

if

(key
==

"box"

)

05

{

06

isModified
=

true

;

07

}

08

}

09

Configuration
config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

10

if

(isModified)

11

{

12

config.AppSettings.Settings.Remove(

"box"

);

13

}

14

config.AppSettings.Settings.Add(

"box"

,
txt_value.Text);

15

config.Save(ConfigurationSaveMode.Modified);

16

ConfigurationManager.RefreshSection(

"appSettings"

);