Replacing issue in json

PS: This issue is only happening when i see result in swagger ui , i visual studio it looks fine.

I am trying to replace the string which i have

\\/Date(1430370000000+0530)\\/
to

\/Date(1430370000000+0530)\/
Code:

 string str = "\\/Date(1430370000000+0530)\\/";
 str = str.Replace(@"\","\\");          
 Console.WriteLine(str);
See here the code running environment, click here

Output i am getting above is this :

\/Date(1430370000000+0530)\/
But while we pass the value in JSON property.

The value automatically converts to below value

/Date(1430370000000+0530)\\/
But I am expecting the same value which I got earlier

\/Date(1430370000000+0530)\/