Answer for Base64 Javascript vs. Base64 C#.Net and JSON calls Written by RED on 10 Sep 2013. Posted in Hello Toni, Much appreciated for your assistance. I’ve used your shutdown parameter above in C# using HttpWebRequest method, submitted to 127.0.0.1 EvoStream Server, and received this response from the server. C# Webpage Text String: key=chdVzT4Ig0UIIx7K C# Codebehind Base64 Encode: a2V5PWNoZFZ6VDRJZzBVSUl4N0s= C# Codebehind Base64 Decode: key=chdVzT4Ig0UIIx7K C# Webpage submit via HttpWebRequest: http://127.0.0.1:7777/shutdownserver?params=a2V5PWNoZFZ6VDRJZzBVSUl4N0s= C# Webpage response from EvoStream: {"data":null,"description":"Shutdown key provided is invalid","status":"FAIL"} Let me know your thoughts. Thank you so much. Regards, RED