c# - cannot find the SPSite name space -

i unable find name space spsite

i have imported these far:

using system; using system.collections.generic; using system.linq; using system.text; using system.net; using microsoft.sharepoint; using system.collections; using microsoft.sharepoint.client; using microsoft.sharepoint; using system.data.sqlclient; using sp = microsoft.sharepoint.client; using system.data;   namespace grandpermission {     class program     {         static void main(string[] args)         {             spsite ospsite = new spsite("http://spdevserver:1002/");         }     } } 

and spsite still has red line under it.

this error occurs since spsite class part of server side object model api:

server side object model api utilized only on machine sharepoint server/foundation installed.

since using client object model api (referenced assembly in project microsoft.sharepoint.client.dll part of sharepoint server 2013 client components sdk) recommend utilize api.

so, line:

spsite ospsite = new spsite("http://spdevserver:1002/");  //ssom 

could replaced with:

using(var ctx = new clientcontext("http://spdevserver:1002/")) {     var site = ctx.site;     //... } 

references

• choose right api set in sharepoint 2013