blocks|key|625305|text|关于16、32和64类型有一个非常重要的注意事项：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|625306|如果您运行此查询...新建(Array.IndexOf+Int16[]{1,2,3}，1)|625307|你应该得到零(0)，因为你在问...在1，2或3的数组中是1。如果你得到-1作为答案，这意味着1不在1，2或3的数组中。|625308|好了，看看我发现了什么:下面所有的都应该给你0，而不是-1+(我已经在所有的框架版本2.0，3.0，3.5，4.0中测试过了)|625309|C#：|625310|Array.IndexOf(new+Int16[]{1,2,3},+1)+=+-1+(not+correct)
Array.IndexOf(new+Int32[]{1,2,3},+1)+=+0+(correct)
Array.IndexOf(new+Int64[]{1,2,3},+1)+=+0+(correct)|code-block|syntax|javascript|625311|VB.NET：|625312|Array.IndexOf(new+Int16(){1,2,3},+1)+=+-1+(not+correct)
Array.IndexOf(new+Int32(){1,2,3},+1)+=+0+(correct)
Array.IndexOf(new+Int64(){1,2,3},+1)+=+-1+(not+correct)|625313|所以我的观点是，对于Array.IndexOf比较，只信任Int32！|625314|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|11|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|14|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

A very important note on the 16, 32 and 64 types:

if you run this query...
Array.IndexOf(new Int16[]{1,2,3}, 1)

you are suppose to get zero(0) because you are asking... is 1 within the array of 1, 2 or 3.
if you get -1 as answer, it means 1 is not within the array of 1, 2 or 3.

Well check out what I found:
All the following should give you 0 and not -1
(I've tested this in all framework versions 2.0, 3.0, 3.5, 4.0)

C#:

<pre><code>Array.IndexOf(new Int16[]{1,2,3}, 1) = -1 (not correct)
Array.IndexOf(new Int32[]{1,2,3}, 1) = 0 (correct)
Array.IndexOf(new Int64[]{1,2,3}, 1) = 0 (correct)
</code></pre>

VB.NET:

<pre><code>Array.IndexOf(new Int16(){1,2,3}, 1) = -1 (not correct)
Array.IndexOf(new Int32(){1,2,3}, 1) = 0 (correct)
Array.IndexOf(new Int64(){1,2,3}, 1) = -1 (not correct)
</code></pre>

So my point is, for Array.IndexOf comparisons, only trust Int32!

blocks|key|410256|text|它们确实是同义词，但是我发现它们之间的细微差别，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|410257|1)创建enum时不能使用Int32|offset|length|style|CODE|410258|enum+Test+:+Int32
{+XXX+=+1+++//+gives+you+compilation+error
}

enum+Test+:+int
{+XXX+=+1+++//+Works+fine
}|code-block|syntax|javascript|410259|2)+Int32属于系统声明。如果删除using.System，则会出现编译错误，但对于int则不会|410260|entityMap^0|0|4|4|D|5|0|0|3|5|J|C|18|3|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]|$D|12|E|13|F|G]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$]]

They both are indeed synonymous, However i found the small difference between them,

1)You cannot use <code>Int32</code> while creating<code>enum</code> 

<pre><code>enum Test : Int32
{ XXX = 1 // gives you compilation error
}

enum Test : int
{ XXX = 1 // Works fine
}
</code></pre>

2) <code>Int32</code> comes under System declaration. if you remove <code>using.System</code> you will get compilation error but not in case for <code>int</code>

blocks|key|625442|text|上面这些人的回答都是对的。int，int16，int32...根据它们的数据存储容量而有所不同。但这就是为什么编译器必须处理这些问题-它是为了解决潜在的2038年问题。请查看链接以了解更多信息。https://en.wikipedia.org/wiki/Year_2038_problem|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|625443|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Year_2038_problem^0|2P|1B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The answers by the above people are about right. int, int16, int32... differs based on their data holding capacity. But here is why the compilers have to deal with these - it is to solve the potential Year 2038 problem. Check out the link to learn more about it.
<a href="https://en.wikipedia.org/wiki/Year_2038_problem" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Year_2038_problem</a>

What is the difference between <code>int</code>, <code>System.Int16</code>, <code>System.Int32</code> and <code>System.Int64</code> other than their sizes?

What is the difference between int, Int16, Int32 and Int64?

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除了大小之外，int、System.Int16、System.Int32和System.Int64之间还有什么区别？

问int、Int16、Int32和Int64有什么区别？
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