I Have A Sp Its Return Type Is Int What Type I Sould Declare In Business Logic

public int ExecuteScalar(String storedprocedure, params SqlParameter[] arrParam)
{
SqlConnection cn = new SqlConnection(connection());
try
{
//initialisation of datatable, Sql connection and sql command
DataSet dt = new DataSet();

SqlCommand cmd = new SqlCommand(storedprocedure, cn);
cmd.CommandType = CommandType.StoredProcedure;

//opens the db connection
if (cn.State == ConnectionState.Closed || cn.State == ConnectionState.Broken)
cn.Open();

//if sql param is not null then gets the parameters from that
if (arrParam != null)
{
foreach (SqlParameter param in arrParam)
cmd.Parameters.Add(param);
}
cmd.CommandTimeout = 5000;
//executes the command and fills it into the datatable

return string;
}

catch (Exception ee)
{

return null;
}
finally
{
cn.Close();
}
}
its showing error on return
it should return 2 thins if success true of false type or 1 ,0