Recently I came across an issue where the query string had unicode characters and ASP.NET’s “HttpUtility.UrlDecode” was not properly converting the characters. After searching few minutes came across the following solution posted by cjsharp1 at Stackoverflow.
private string GetQueryStringValueFromRawUrl(string queryStringKey)
{
var currentUri = new Uri(HttpContext.Current.Request.Url.Scheme + "://" +
HttpContext.Current.Request.Url.Authority +
HttpContext.Current.Request.RawUrl);
var queryStringCollection = HttpUtility.ParseQueryString((currentUri).Query);
return queryStringCollection.Get(queryStringKey);
}