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How to Convert a string containing escaped JSON to object?

I have a JSON received from a third part, which I can't change.
This JSON has a property with special characters
"CryptoKey":"dqwe`fqer]OS#xMKA^Qd[3123ddFjqr412_hRHBXTfNEyp\lVLoia",
So, when I try to deserialize it, I receive the following error:
Newtonsoft.Json.JsonReaderException: 'Bad JSON escape sequence: \l. Path '['148/FOEConfiguration'].CryptoKey', line 7, position 75.'
What I'm doing is:
string text = File.ReadAllText(configFile);
dynamic result = JsonConvert.DeserializeObject(text);
Is there a way to deserialize this to an object without breaking it?
Or I'll have to read in a diferent way?

Corrupted JSON HTTP response

I am getting a HTTP request for a website and the content type is JSON. However, I am getting a nested JSON that is a unicode and is causing consistency problems.
Here is an example:
{"key1":"value",
"key2":"value",
"key3":{
u'key31':u'value',
u'key32':u'value'}}
This reminds me of python 2.7 troubles but I am not sure how to fix this JSON. I am using C# to parse it. Everything works correctly until I try to access key3.
The content should be a JSON object type but it is considered rather a value or a string.
Thanks for ya help. Is there a way to fix it if it is actually corrupted or am I parsing it wrongly?

You're correct that this json object is not complete / does not have the correct syntax. You're missing a closing '}' character.
How are you parsing your data? Try taking a look at this documentation.

your json object is not in valid formatted it should be like as folllows
{
"key1":"value",
"key2":"value",
"key3":{
" u'key31'":"u'value'",
"u'key32'":"u'value'"
}
}
by any chance do you get this json from python dump? coz Python's unicode literals are not valid JSON, and neither are single quotes

Dynamic Json deserialization

Deserialize JSON into C# dynamic object?
Following above question, I copy the dynamicJsonDeserilization and trying to use that in my application.
then I try to access the object as
var Data = json.deserilization(jsonstring);
Now, my string is
{"0":{"Name":"C:\\","Type":"Partition","Path":"C:\\"},"1":{"Name":"D:\\","Type":"Partition","Path":"D:\\"},"2":{"Name":"E:\\","Type":"Partition","Path":"E:\\"}}
i.e. I just have an Array on my server which I convert to JSON string and send.
As per code from best answer I should be able to access it as Data.0 but it give "End of Expression expected", Also Data[0] is giving same error. I am not sure how can I use it ? Any help is appreciated. Thanks.

Now, my string is
{"0":{"Name":"C:\","Type":"Partition","Path":"C:\"},"1":{"Name":"D:\","Type":"Partition","Path":"D:\"},"2":{"Name":"E:\","Type":"Partition","Path":"E:\"}}
Your string is indeed not valid JSON due to escaped quotes.
Those C:\ are breaking the parser. You should generate it like this, sending three backslahes:
{"0":{"Name":"C:\\\","Type":"Partition","Path":"C:\\\"} ...

converting json string into json on client side?

In my javascript code I am getting json string from cs file
var tmpString="<%=resultset2%>";
In cs I am concatenating strings to build json string. Here is an issue the json string is returned as a string and it has " with it.
"[{id:'1',name:'Aik'},{id:'2',name:'Aik or Aik'}]"
Because of " in beginning and end javascript code treat it as a string. Kindly guide me how I should sort out this issue.
thanks

Fix the JSON, it has errors (property names must be strings (and thus quoted), and only " are acceptable for quoting strings in JSON). JSON is a subset of JavaScript, you can't use all of JS' syntax in JSON. As a rule of thumb, if you are concatenating strings to produce a data format, then you are doing it wrong. http://json.org/ lists a number of C# libraries that you can use to build JSON.
Use json2.js

Change this:
var tmpString="<%=resultset2%>";
to:
var tmpString=<%=resultset2%>;
This isn't JSON, you're just writing javascript from a server page. The problem is you are creating invalid javascript syntax, you just need to remove the quotes.
The quotes aren't from resultset2 they are from your markup.

.NET PostSubmitter sends backslashes

I'm using C# to send JSON to a PHP-Script, like this:
string json = "{";
json += "\"prop\":\"some text\"";
json += "}";
PostSubmitter post = new PostSubmitter();
post.Url = "http://localhost/synch/notein.php";
post.Type = PostSubmitter.PostTypeEnum.Post;
post.PostItems.Add("note", json);
post.Post();
Of course I'll have to escape the inner quotes, but they get sended to the script! To make things worse: There is text, which already has quotation marks, so those must be escaped to be valid JSON. In this case I want the backslashes to be transmitted. Any idea to accomplish this?

Why not serialize the custom object to json result. That way you don't have to worry about the escaping, the framework would... Here is an example using JavaScriptSerializer - Convert objects to JSON in C# using JavaScriptSerializer

Escape your backslashes \\:
json += "\\\"prop\":\\\"some text\\\"";

Ooops, thought PostSubmitter is from the .NET-framework, but it's third-party. Nevertheless: Turned out that this is a PHP-problem. If someone has a similar problem: Look for get_magic_quotes_gpc in PHP-docs.