您可以设置会话超时

 ＆LT;结构＆gt;
      ＆LT;＆的System.Web GT;
         ＆LT;的sessionState超时=200＆GT;＆LT; /＆的sessionState GT;
      ＆LT; /system.web>
    ＆LT; /结构＆gt;
 

  

超时属性可以在Web.config文件中设置为
  使用的sessionState超时属性的应用程序
  配置元素，也可以设置超时属性值
  直接使用应用程序code。

  
  

的超时属性不能设置到一个值大于525600
  分钟（1年）。默认值是20分钟。

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I'm working on asp.net project. how can I increasing the session timeout. (infinity timeout) ? or can I do this on IIS server. if it can, please explane..

You can set session timeout in web.config as sown below 200 is showing minute so you can set as long as you want..

    <configuration>
      <system.web>
         <sessionState timeout="200"></sessionState>
      </system.web>
    </configuration>

The Timeout property can be set in the Web.config file for an application using the timeout attribute of the sessionState configuration element, or you can set the Timeout property value directly using application code.

The Timeout property cannot be set to a value greater than 525,600 minutes (1 year). The default value is 20 minutes.