Prevent inline JavaScript on Internet Explorer 11 using Content Security Policy

Is it possible prevent inline JavaScript on Internet Explorer 11 using CSP on ASP.NET WebForm? I know IE 11 does not support Content Security Policy Level 2 but it seen that support Level 1.0. I tried many way and there is not a clear answer out there. I tried:

• Response.AddHeader("X-Content-Security-Policy", "script-src 'none'");
• Response.AddHeader("X-Content-Security-Policy","script-src 'self'");
• Response.AddHeader("Content-Security-Policy", "script-src 'self'");

it's not working.

Thanks! Albert Torres