Could not load file or assembly microsoft.sqlserver.smo. Version 12.0.0.0

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SQL

C#3.5

I got this error Could not load file or assembly 'Microsoft.SqlServer.smo. version 12.0.0.0' while connecting my application to sql server.

My Code:

C#

string sqlConnectionString = cn.ConnectionString.ToString();
           SqlConnection conn = new SqlConnection(sqlConnectionString);
           StringBuilder sb = new StringBuilder();
           string script = string.Empty;
           Microsoft.SqlServer.Management.Smo.Server server = new Server(new ServerConnection(conn));
           try
           {
               MessageBox.Show(server.Information.Version.ToString());
           }
           catch (Exception EX) { }

If you solve this error it would be appreciated.



What I have tried:

I have written code like this

string sqlConnectionString = cn.ConnectionString.ToString();
SqlConnection conn = new SqlConnection(sqlConnectionString);
StringBuilder sb = new StringBuilder();
string script = string.Empty;
Microsoft.SqlServer.Management.Smo.Server server = new Server(new ServerConnection(conn));
try
{
MessageBox.Show(server.Information.Version.ToString());
}
catch (Exception EX) { }