[C #-SQLite] SQLite has some strange problems,

[C #-SQLite] SQLite has some strange problems,

Today, the DAO layer of the entire C #, I used 2013, and the. NetFramework of 4.0 encountered an exception after the Helper is created.

+ Connection "helper. Connection" causes an exception of the "System. IO. FileLoadException" type: System. Data. IDbConnection {System. IO. FileLoadException}

 

Later, I found an article and added it to app. config.

<Startup useLegacyV2RuntimeActivationPolicy = "true">
<SupportedRuntime version = "v4.0"/>
<RequiredRuntime version = "v4.0.20506"/>
</Startup>

Http://blog.163.com/lemon_wangjun/blog/static/1197883802011312104054675/

 

After joining, it is good, but it is strange that the following exceptions sometimes occur.

 

Later, I flipped through the old Project Settings and added the following settings. It is now ready.

<Startup useLegacyV2RuntimeActivationPolicy = "true">
<SupportedRuntime version = "v4.0" sku = ". NETFramework, Version = v4.0"/>
</Startup>