To add a MIME map for a site in IIS

In the IIS (Express) By default does not support the JSON format data, the data always can not load, later looked up only then to know is the MIME mapping question, therefore needs in the site root directory new or modifies the Web.config file resolution, adds or modifies the <system.webServer> node, the method is as follows:

<?xml version= "1.0"?><Configuration>  <System.web>  <Compilationdebug="False"targetframework="4.0"/> </System.web> <!--add MIME mappings for sites in IIS (Express)--> <system.webserver>  < staticcontent>   <mimemap fileextension= ". JSON "mimetype=" Application/x-javascript "/>  </staticcontent> </system.webserver></ configuration> 
 
 Fuck, waste me one hours, record. 
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To add a MIME mapping for a site in IIS