Visual Studio 2019 VS的.pdb文件是什么？（用于调试）
可进入dll库调试。不管是本地dll调试还是附加到进程调试，如果dll工程中的pdb文件不存在了，则不能进入dll源码调试。如果不再调试，平时可以删除pdb文件，因为每次运行会自动生成。
PDB用途
用于调试。
可进入dll库调试。不管是本地dll调试还是附加到进程调试，如果dll工程中的pdb文件不存在了，则不能进入dll源码调试。
如果不再调试，平时可以删除pdb文件，因为每次运行会自动生成。
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文章目录
.PDB文件在Visual Studio 2019中的重要性
.PDB（Program Database）文件是一个包含程序调试信息的文件，它们被广泛应用于Windows环境中的调试过程。本文将详细探讨.PDB文件的作用、如何生成和使用它们以及在Visual Studio 2019中的应用。
一、.PDB文件的基本概念与作用
.PDB文件主要存储以下几类信息：
- 类型信息：此信息用于表示源代码中所有类型的定义。
- 符号信息：此信息代表了源代码中的所有符号，例如函数和变量。
- 源文件信息：包括源文件的名称和其路径。
- 行号信息：此信息与源代码中每行对应的机器代码相关。
通过以上信息，.PDB文件使得开发者能够在调试时准确地定位到源代码的具体位置，这在调试大型项目时尤为重要。
public class HelloWorld
{
static void Main()
{
System.Console.WriteLine("Hello, World!");
}
}
二、如何生成.PDB文件
在Visual Studio 2019中，可以通过修改项目属性来配置是否生成.PDB文件。以下是生成.PDB文件的步骤：
- 在解决方案资源管理器中，右键点击需要修改的项目，选择“属性”。
- 在项目属性页面中，选择“构建”选项卡。
- 在“输出”部分，勾选“生成调试信息”。
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
</PropertyGroup>
三、在Visual Studio 2019中使用.PDB文件
如果想要在Visual Studio 2019中使用.PDB文件进行调试，可以按照以下步骤操作：
- 打开"工具"菜单，选择"选项"。
- 在弹出的对话框中，展开"调试"节点，选择"符号"。
- 在符号文件(.pdb)位置列表中，添加所需.PDB文件的路径。
四、.PDB文件的注意事项
在使用.PDB文件时，有几点需要注意：
- 为了保证调试信息的正确性，编译的DLL或EXE文件必须与其对应的.PDB文件版本一致。也就是说，每次重新编译都会生成新的.PDB文件，旧的.PDB文件将无法使用。
- PDB文件通常很大，但可以使用Microsoft的pdbcopy工具来删除不必要的信息，从而缩小文件大小。
pdbcopy /y /u source.pdb target.pdb
结语
.PDB文件在程序调试中起着至关重要的作用。虽然他们可能会增加项目的大小，但考虑到他们带来的便利，这个代价是值得付出的。无论是在定位问题，还是在优化代码方面，.PDB文件都是我们不可或缺的助手。
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