when i install EF 6 then i get two error

Error 12 Unable to copy file "E:\Uday\Demo\packages\EntityFramework.6.1.3\lib\net45\EntityFramework.dll" to "bin\EntityFramework.dll". The process cannot access the file 'bin\EntityFramework.dll' because it is being used by another process. Demo

 

 

Error 13 Could not copy "E:\Uday\Demo\packages\EntityFramework.6.1.3\lib\net45\EntityFramework.dll" to "bin\EntityFramework.dll". Exceeded retry count of 10. Failed. Demo