Data source is an invalid type. It must be either an IListS

Question

i have a query like  

var count = db.Employees.Count (x =>(x.Salary >0));

Grid1.DataSource = count;

Grid1.DataBind();

but wen im execute its its throughing an error Like

Data source is an invalid type. It must be either an IListSource, IEnumerable, or IDataSource.

and wen i was writen code like Grid1.DataSource = count.tostring();

its not showing output properly