From this answer for the company name:
Assembly currentAssem = typeof(CurrentClass).Assembly;
object[] attribs = currentAssem.GetCustomAttributes(typeof(AssemblyCompanyAttribute), true);
if(attribs.Length > 0)
{
string company = ((AssemblyCompanyAttribute)attribs[0]).Company
}
Similar for the copyright. (Use the AssemblyCopyrightAttribute
).