Can not build SuperSocket.ServerManager.Client.WPF in Net4

Feb 28, 2014 at 2:39 AM
Any one can help?
there is a bulid errro.
error MC1000: Unknown build error, 'Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.'
Mar 15, 2014 at 5:58 AM
Do you have more detailed log?