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using System;
using System.Collections.Generic;
using System.Linq;
class Data
{
public int Key;
public string Value;
}
class Join
{
public static int Main ()
{
Data[] d1 = new Data[] { new Data () { Key = 1, Value = "First" } };
Data[] d2 = new Data[] {
new Data () { Key = 1, Value = "Second" },
new Data () { Key = 1, Value = "Third" }
};
var e = from a in d1
join b in d2 on a.Key equals b.Key
select new { Result = a.Value + b.Value };
var res = e.ToList ();
if (res.Count != 2)
return 1;
if (res [0].Result != "FirstSecond")
return 2;
if (res [1].Result != "FirstThird")
return 3;
e = from Data a in d1
join b in d2 on a.Key equals b.Key
where b.Value == "Second"
select new { Result = a.Value + b.Value };
res = e.ToList ();
if (res.Count != 1)
return 4;
if (res [0].Result != "FirstSecond")
return 5;
// Explicitly typed
e = from Data a in d1
join Data b in d2 on a.Key equals b.Key
select new { Result = a.Value + b.Value };
res = e.ToList ();
if (res.Count != 2)
return 10;
if (res [0].Result != "FirstSecond")
return 11;
if (res [1].Result != "FirstThird")
return 12;
var e2 = from Data a in d1
join b in d2 on a.Key equals b.Key
group b by a.Key;
var res2 = e2.ToList ();
if (res2.Count != 1)
return 20;
if (res2 [0].Key != 1)
return 21;
Console.WriteLine ("OK");
return 0;
}
}
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