https://learn.microsoft.com/en-us/dotnet/api/system.web.util.httpencoder.headernamevalueencode?view=netframework-4.8.1&redirectedfrom=MSDN
HttpEncoder.HeaderNameValueEncode(String, String, String, String) Method (System.Web.Util) |...
Encodes a header name and value into a string that can be used as an HTTP header.
system webstringmethodutil