System.Security.SecurityException：该程序集不允许部分信任的调用者

i am creating pdf by using itextsharp.dll, local it is working fine. but server am facing below error .i have added assemblyinfo.cs ..but same error is coming.Specifically, I modified the AssemblyInfo.cs file by adding these references and attribute:i am creating pdf by using itextsharp.dll, loca