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var source = "京东商城";
var result = string.Empty;
foreach (var c in source)
result += string.Format("{0}{1:x4}", @"\u", (int) c);
var source = "京东商城";
var result = source.Aggregate(string.Empty,
(current, c) => current + string.Format("{0}{1:x4}", @"\u", (int) c));
Console.WriteLine(result);
\u4eac\u4e1c\u5546\u57ce
请按任意键继续. . .