Asp.net adds JS and CSS references to the front-end head in the background.

Htmlgenericcontrol JS  =     New  Htmlgenericcontrol (  "  Script  "  );

JS. attributes [  "  Type  "  ]  =     "  Text/JavaScript "  ;

JS. attributes [  "  SRC  "  ]  =     "  JS/jquery. Validate. js  "  ;

Htmlgenericcontrol mes  =     New  Htmlgenericcontrol (  " Script  "  );

Mes. attributes [  "  Type  "  ]  =     "  Text/JavaScript  "  ;

Mes. attributes [  "  SRC  "  ] =     "  JS/jquery. Validate. messages_cn.js  "  ;

Htmlmeta meta1  =     New  Htmlmeta ();

Meta1.name  =     "  Keywords  "  ;

Meta1.content =     "  L ****  "  ;

Htmlmeta meta2  =     New  Htmlmeta ();

Meta2.name  =     "  Description  "  ;

Meta2.content  =    "  ********  "  ;

Page. header. Controls. Add (JS );

Page. header. Controls. Add (MES );

Page. header. Controls. Add (meta1 );

Page. header. Controls. Add (meta2 );

  //  If you find that there are no built-in methods or attributes, use the following method:  
  
Htmlgenericcontrol mes  =     New  Htmlgenericcontrol (  " Tag  "  );

Mes. attributes [  "  Attribute  "  ]  =     "  **  "  ;

Mes. attributes [  "  Attribute  "  ]  =    "  ***  "  ;