Sign in assembly error

Sep 21, 2013 at 4:33 AM
Hello everyone,
I am adding reference successfully. But when i am sign the assembly & select certificate file. After selecting certificate file, when i am build project that give me error. Show this error:
  1. Assembly generation failed -- Referenced assembly 'WinRTXamlToolkit' does not have a strong name
  2. Assembly generation failed -- Referenced assembly 'WinRTXamlToolkit.Controls.DataVisualization' does not have a strong name