最近问题就来了如何使用的String.Format（）。我的答案的一部分，包括建议使用StringBuilder.AppendLine（的String.Format（...））。乔恩斯基特认为这是一个坏榜样，用AppendLine和AppendFormat的组合方案。

我突然想到我从来没有真正解决自己变成了一个preferred的方式使用这些方法。我想我可能会开始使用类似下面的，但我想知道其他人作为一个最佳实践用什么：

  sbuilder.AppendFormat（{0}行，第一）AppendLine（）;
sbuilder.AppendFormat（{0}行，二）AppendLine（）。

//相对于：

sbuilder.AppendLine（的String.Format（{0}行，第一））;
sbuilder.AppendLine（的String.Format（{0}行，二））;
 

解决方案

我认为 AppendFormat 然后按 AppendLine 作为不但更加易读，也比打电话更好的性能 AppendLine（的String.Format（...））。

后者创建了一个全新的字符串，然后批发其追加到现有的建设者。我不打算尽量去的话称：为什么使用StringBuilder的那么麻烦？但它确实显得有点反对StringBuilder的精神。

A recent question came up about using String.Format(). Part of my answer included a suggestion to use StringBuilder.AppendLine(string.Format(...)). Jon Skeet suggested this was a bad example and proposed using a combination of AppendLine and AppendFormat.

It occurred to me I've never really settled myself into a "preferred" approach for using these methods. I think I might start using something like the following but am interested to know what other people use as a "best practice":

sbuilder.AppendFormat("{0} line", "First").AppendLine();
sbuilder.AppendFormat("{0} line", "Second").AppendLine();

// as opposed to:

sbuilder.AppendLine( String.Format( "{0} line", "First"));
sbuilder.AppendLine( String.Format( "{0} line", "Second"));

I view AppendFormat followed by AppendLine as not only more readable, but also more performant than calling AppendLine(string.Format(...)).

The latter creates a whole new string and then appends it wholesale into the existing builder. I'm not going to go as far as saying "Why bother using StringBuilder then?" but it does seem a bit against the spirit of StringBuilder.