gistfile1.cs

var loltable = new[] { 
	new { Property = "Name", Value = "Glenn", Id = 7 },
	new { Property = "LastName", Value = "Brax", Id = 7 },
	new { Property = "Active", Value = "1", Id = 7 },
	new { Property = "Name", Value = "Kossa", Id = 5 },
	new { Property = "LastName", Value = "Mu", Id = 5 },
	new { Property = "Active", Value = "0", Id = 5 },
	new { Property = "Name", Value = "Trololol", Id = 2 },
	new { Property = "LastName", Value = "Håhåhå", Id = 2 },
	new { Property = "Active", Value = "1", Id = 2 }
};

var lol = from lol in loltable
		  group lol by lol.Id into lolGroups
  		  select new {
			Id = lolGroups.Key,
			Name = lolGroups.First (g => g.Property == "Name").Value,
			LastName = lolGroups.First (g => g.Property == "LastName").Value,
			Active = lolGroups.First (g => g.Property == "Active").Value
		  };