How to combine (AND) two LINQ expressions in one

private static Expression<Func<object, bool>> AndExpressions(

    Expression<Func<object, bool>> expression1,

    Expression<Func<object, bool>> expression2)

{

    if (expression1 == null)

    {

        return expression2;

    }

    else if (expression2 == null)

    {

        return expression1;

    }

    else

    {

        var invokedExpr = Expression.Invoke(expression2, expression1.Parameters.Cast<Expression>());

        return Expression.Lambda<Func<object, bool>>(Expression.AndAlso(expression1.Body, invokedExpr), expression1.Parameters);

    }

}