I'm not sure what the problem is, but this works fine for me so I don't think the problem is the accents...

declare @table table ( x varchar(255) )

declare @my_value varchar(100)

set @my_value = 'This will select everything fróm my táblé'

insert into @table (x) values (@my_value)

select * from @table

Maybe it's a Unicode conversion problem when you're reading the file, I dunno. Is there a particular reason for your using the Microsoft.SqlServer.Management assemblies? If not, just use System.Data and System.Data.SqlClient, and use the File object to read your file instead of FileInfo, something like this:

using System;

using System.Data;

using System.Data.SqlClient;

using System.IO;

namespace ConsoleApplication1

{

static class Program

{

static void Main(string[] args)

{

string sqlConnectionString = "<your connection string here>";

using (SqlConnection conn = new SqlConnection(sqlConnectionString))

{

string sqlCommandFilePath = "<path to your file>";

if (File.Exists(sqlCommandFilePath))

{

string script = File.ReadAllText(sqlCommandFilePath);

using (SqlCommand cmd = new SqlCommand(script, conn))

{

int affectedRows = cmd.ExecuteNonQuery();

}

}

}

}

}

}

Try this, see if it works any better.