Missing dll How to insert it

[tradingest]

Hi,

when I compile the Indicator or Strategy I have problem with the dll. Probably are missing.
By mistake I deleted them dll below and I can no longer insert them because I don't know how individual. Can anyone help me?

thanks a lot

System.dll

System.Core.dll

System.Drawing.dll

System.Windows.Forms.dll

System.XML.dll

Thanks in advance

[bltdavid]

Have you tried re-installing the .NET Framework?

[tradingest]

Have you tried re-installing the .NET Framework?

Thanks I resolved installing again Microsoft .NET

Thanks