使用属性调用

Rules rules = new Rules();
if ( rules.ProjectRequiresApproval ) {
    // get approval
} else {
    // skip approval
}

使用方法调用

Rules rules = new Rules();
if ( rules.ProjectRequiresApproval() ) {
    // get approval
} else {
    // skip approval
}

规则类将规则显示为属性

public class Rules() {
    private int _amount;
    private int threshold = 100;
 
    public Rules()  {
        _amount = someExpensiveXpathOperation;
    }
 
    // rule property
    public bool ProjectRequiresApproval {
        get { return _amount > threshold }
    }
}

规则类暴露规则作为方法

public class Rules() {
    private int _amount;
    private int threshold = 100;
 
    public Rules()  {
        _amount = someExpensiveXpathOperation;
    }
 
    // rule method
    public bool ProjectRequiresApproval() {
        return _amount > threshold;
    }
}

一个人的利弊是什么？