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随手记录一下Lamda表达式Group By 分组，并且将查询结果转换为List<string> 及 Dictionary<string,string>

dbContext.TempLib.GroupBy(a => a.TL_SourceFrom).Select(g => (new { key = g.Key, value = g.Key })).ToDictionary(p=>p.key,p=>p.value);

            //dbContext.TempLib.GroupBy(a => a.TL_SourceFrom).Select(g => (new { key = g.Key, value = g.Key })).Select(a => a.key).ToList()