I found Solution it's working fine now, If any one haveing doubts ask me for Create,Update,Get functionalities
private void UpdateProfileId(string Id)
{
SforceService sfs = new SforceService();
var login = sfs.login(ConfigurationManager.AppSettings["username"],ConfigurationManager.AppSettings["password"]);
sfs.Url = login.serverUrl;
sfs.SessionHeaderValue = new SessionHeader();
sfs.SessionHeaderValue.sessionId = login.sessionId;
var userinfo = login.userInfo;
QueryResult qr = null;
sfs.QueryOptionsValue = new salesforce.QueryOptions();
User[] UpdateUser = new User[1];
User objuser = new User();
objuser.Id = Id;
objuser.ProfileId = "00e90000001CcTnAAK";
UpdateUser[0] = objuser;
try
{
SaveResult[] saveResults = sfs.update(UpdateUser);
foreach (SaveResult saveResult in saveResults)
{
if (saveResult.success)
{
Console.WriteLine("Successfully updated Account ID: " +saveResult.id);
}
}
}
}