分割清單，較小的列表C＃

Question

我生成使用此代碼列表：

 var Data2 = Data.GroupBy(i => new { i.City, i.County, i.Type }) 
            .Select(group => new { Name = group.Key, Number = group.Count() }) 
            .OrderBy(x => x.Name).ThenByDescending(x => x.Number).ToList(); 

這份名單大約有5100條記錄。我想生成獨特的城市和縣名單。一些列表或數組可以爲我工作。你能給我一些想法嗎？謝謝。

編輯：

例如該查詢返回這樣一個列表：

{ Name = {{ City = New York City, County = Bronx, Type = Type A }}, Count = 4 } 

    { Name = {{ City = New York City, County = Bronx, Type = Type B }}, Count = 8 } 

    { Name = {{ City = New York City, County = Bronx, Type = Type C }}, Count = 24 } 

    { Name = {{ City = New York City, County = Manhattan, Type = Type B }}, Count = 43 } 

    { Name = {{ City = New York City, County = Manhattan, Type = Type C }}, Count = 58 } 

    { Name = {{ City = Seattle, County = King County, Type = Type D }}, Count = 43 } 

    { Name = {{ City = Seattle, County = King County, Type = Type A }}, Count = 67 } 

    { Name = {{ City = Seattle, County = Snohomish County, Type = Type C }}, Count = 67 } 

我想使這個名單幾個列表如下：

表1：

{ Name = {{ City = New York City, County = Bronx, Type = Type A }}, Count = 4 } 

    { Name = {{ City = New York City, County = Bronx, Type = Type B }}, Count = 8 } 

    { Name = {{ City = New York City, County = Bronx, Type = Type C }}, Count = 24 } 

列表2：

{ Name = {{ City = New York City, County = Manhattan, Type = Type B }}, Count = 43 } 

    { Name = {{ City = New York City, County = Manhattan, Type = Type C }}, Count = 58 } 

表3：

{ Name = {{ City = Seattle, County = King County, Type = Type D }}, Count = 43 } 

    { Name = {{ City = Seattle, County = King County, Type = Type A }}, Count = 67 } 

表4：

{ Name = {{ City = Seattle, County = Snohomish County, Type = Type C }}, Count = 67 } 

Answer 1

應該這樣做：
它的一組中的一組

var Data2 = 
    Data.GroupBy(i => new {i.City, i.County, i.Type}) 
     .Select(group => new {Name = group.Key, Count = group.Count()}) 
     .OrderBy(x => x.Name) 
     .ThenByDescending(x => x.Count) 
     .GroupBy(g => new {g.Name.City, g.Name.County}) 
     .Select(g => g.Select(g2 => 
      new {Name = new {g.Key.City, g.Key.County, g2.Name.Type}, g2.Count}));