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Fixed in 2021.2.X



Found in






Issue ID




[android] HttpUtility Null reference exception on .net 4.x when performing HttpUtility.UrlEncode



How to reproduce:
1. Build and run the "Http" Project on an Android device
2. Check the logs once the Project fully loads

Expected Behavior: The method is executed without errors
Actual Behavior: Null reference or "called non-existent method System.String System.Web.HttpUtility" exception is thrown

Reproducible with: 2020.1.17f1, 2020.2.2f1, 2021.1.0b2, 2021.2.0a2

Reproducible with devices:
Xiaomi 9T (customer's device)
VLNQA00015, Samsung Galaxy Note8 (SM-N950W), Android 8.0.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00286, Meizu - (PRO 5), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760

- The customer had two different exceptions (added them in the case edits)
- Only reproducible on android

  1. Resolution Note (fix version 2021.2):

    Fixed 2021.2.0a8

Comments (4)

  1. longsl

    Apr 26, 2022 14:57

    Alternative in old unity version:

    don't including a dependency on System.Web. Another way to do this is:
    NameValueCollection queryParameters = new NameValueCollection();
    string[] querySegments = queryString.Split('&');
    foreach(string segment in querySegments)
    string[] parts = segment.Split('=');
    if (parts.Length > 0)
    string key = parts[0].Trim(new char[] { '?', ' ' });
    string val = parts[1].Trim();

    queryParameters.Add(key, val);

  2. longsl

    Apr 26, 2022 14:25

    same problem in 2020.3.30f1c1

  3. stamatian

    Jul 16, 2021 07:57

    Ok I found a solution. I used WebUtility.UrlEncode instead of HttpUtility.UrlEncode and it works now!

  4. stamatian

    Jul 15, 2021 16:33

    Hi is there a workaround for older versions? I'm using Unity 2021.1.15f and I can't upgrade my project. I noticed that in 2021.2.0b3 there isn't this error... Ho can I fix this without upgrading?

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