Func delegation and Lambda expressions in LINQ

MSDN official explanation for Func <T, TResult>): encapsulate a method that has a parameter and returns the type value specified by the TResult parameter.

        protected void Page_Load(object sender, EventArgs e)        {            var db = new DataClasses3DataContext();            var f = db.Table_1s.AsEnumerable();            Func<int, int> addone = delegate(int s) { return s=s+1; };            GridView1.DataSource = f.Select(t=>t.id);            GridView1.DataBind();        }

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        protected void Page_Load(object sender, EventArgs e)        {            var db = new DataClasses3DataContext();            var f = db.Table_1s.AsEnumerable();            Func<int, int> addone = delegate(int s) { return s=s+1; };            GridView1.DataSource = f.Select(t=>addone(t.id));            GridView1.DataBind();        }

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In the first example, t => addone (t. id) and t => t. id + 1 have the same effect.

        protected void Page_Load(object sender, EventArgs e)        {            var db = new DataClasses3DataContext();            var f = db.Table_1s.AsEnumerable();            Func<int, int> addone = delegate(int s) { return s=s+1; };            Func<int, bool> dayu = delegate(int s) { return s>3; };            GridView1.DataSource = f.Where(t => dayu(t.id)).Select(t =>t.id);            GridView1.DataBind();        }

Running result

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