Site Search Using Windows Catalog Service

string strCatalog = "Test"; 

string strQuery = "Select Filename,VPath,Path from SCOPE() 
where FREETEXT('" + TextBox1.Text + "') "; 

string connString = "Provider=MSIDXS;Data Source='" + strCatalog + "'"; 

OleDbConnection Connection = new OleDbConnection(connString); 
Connection.Open(); 
OleDbDataAdapter da = new OleDbDataAdapter(strQuery, Connection); 

DataSet ds = new DataSet(); 
da.Fill(ds); 
Connection.Close(); 

DataView source= new DataView(ds.Tables[0]); 
DataGrid1.DataSource = source; 
DataGrid1.DataBind();