C# : System.Net.WebException: The underlying connection was closed

Question

I have the following code :

String url = // a valid url
String requestXml = File.ReadAllText(filePath);//opens file , reads all text and closes it
byte[] bytes =         


        

Answer 1

Adding this line of code solved the problem for me:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

This was taken from: https://our.umbraco.com/forum/using-umbraco-and-getting-started/74628-the-underlying-connection-was-closed-an-unexpected-error-occurred-on-a-send