Question

How do you copy DbCommand parameters to another DbCommand, I want a new DbCommand with the same parameters as my last DbCommand. But now with a different sql string.

Answer 1

You could put the code you need to re-use in a separate method:

public DbCommand RecycledParameters(string sql, IList<DbParameter> parameters)
{
    var result = db.GetSqlStringCommand(sql);
    foreach(DbParameter p in parameters)
    {  
        db.AddInParameter(result, p.ParameterName, p.DbType, p.Value);
    }
    return result;
}