C# List Insert用法

C# code

string[] tableArray = query.tablestr.Split(',');            Dictionary<string, int> Lengths = new Dictionary<string, int>();            for (int n = 0; n < tableArray.Length - 1; n++)            {                for (int u = 0; u < TableLengths.Count; u++)                {                    if (TableLengths[u].Name == tableArray[n])                    {                        Lengths.Add(TableLengths[u].Name, TableLengths[u].Length);                    }                }            }            var list = (from d in Lengths orderby d.Value ascending select d).ToList();//排序//我现在要对list进行插入操作//请问怎么在list中插入<string, int>这种类型的元素啊

C# code

            Dictionary<string, int> Lengths = new Dictionary<string, int>();            Lengths.Add("a", 1);            Lengths.Add("b", 2);            Lengths.Add("c", 3);            var list = (from d in Lengths orderby d.Value ascending select d).ToList();            list.Add(new KeyValuePair<string, int>("d", 4));
[解决办法]
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C# code
string[] tableArray = query.tablestr.Split(',');
            Dictionary<string, int> Lengths = new Dictionary<string, int>();
            for (int n = 0; n < tableArray.Length - 1; n++)
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