I got this error when I tried to connect to my db in sql server.

Unable to add data connection. Could not load file or assembly 'Microsoft.SqlServer.Management.Sdk.Sfc, Version =, Culture = neutral, PublicKeyToken = 8945dcd8080cc91' or one of its dependencies. The system cannot find the file specified.

Could you help solve this problem?
I went to Computer > Local Disk (C:) > Windows > assembly and I didn't found the 'Microsoft.SqlServer...'
Please help me! Thank you!