JToken.SelectToken抛出Newtonsoft.Json.JsonException未知的转义字符：\

Question

有人可以帮助我使用正确的JsonPath语法来选择名称为“US \ East”的“位置”吗？

JObject location = new JObject();
location.Add("name", @"US \ East");

JArray locations = new JArray();
locations.Add(location);

JObject properties = new JObject();
properties.Add("locations", locations);

string path = "locations[?(@.name == 'US \\ East')]";
JToken item = properties.SelectToken(path);

最后一行抛出以下异常：

Newtonsoft.Json.JsonException was unhandled
_HResult=-2146233088
_message=Unknown escape chracter: \ 
HResult=-2146233088
IsTransient=false
Message=Unknown escape chracter: \ 
Source=Newtonsoft.Json
StackTrace:
  at Newtonsoft.Json.Linq.JsonPath.JPath.ReadQuotedString()
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParseValue()
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParseExpression()
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParseQuery(Char indexerCloseChar)
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParseIndexer(Char indexerOpenChar)
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParsePath(List`1 filters, Int32 currentPartStartIndex, Boolean query)
  at Newtonsoft.Json.Linq.JsonPath.JPath.ParseMain()
  at Newtonsoft.Json.Linq.JsonPath.JPath..ctor(String expression)
  at Newtonsoft.Json.Linq.JToken.SelectToken(String path, Boolean errorWhenNoMatch)
  at Newtonsoft.Json.Linq.JToken.SelectToken(String path)
  at JsonPath.Program.Main(String[] args)