In controller part ASP.NET MVC 4 Survey project - asp.net

Question

In the code below I have a problem:
List<SurveyContext> surveys = (from s in DbContext.Surveys
where s.userName == s.userName
select s.ID).ToList();
if(surveys.Count() > 0)
{
int id = 0;
int.TryParse(Surveys.First(), id);
return id;
}
return 0;
Error : ToList()
Error 1 A local variable named 's' cannot be declared in this scope because it would give a different meaning to 's', which is already used in a 'parent or current' scope to denote something else
and here:
int.TryParse(Surveys.First(), id);
The name 'Surveys' does not exist in the current context
But this name exist in context... Can anyone help me??

Answer 1

Error 1
Use == instead of =
where s.userName == userName
Error 2
Try naming s variable on your linq query in a different way, maybe su or survey. But it seems to me that error is on code that you're not showing.
List<SurveyContext> surveys = (from su in DbContext.Surveys
where su.userName == su.userName
select su.ID).ToList();
Error 3
I think you meant surveys instead of Surveys and you need to use out when passing idparam
int.TryParse(surveys.First(), out id);
And since you're not evaluating parse result I'd say you should use int.Parse
id = int.Parse(surveys.First());
And you have to use a property of survey, you're trying to convert the entire survey instance to int
id = int.Parse(surveys.First().Property);