（C＃）DLL内的参考DLL

Question

I wrote databases.dll and referenced 2 dlls inside.

Npgsql.dll and MySql.Data.dll

I compiled my project to databases.dll in command line like this:

csc.exe /target:library /r:Npgsql.dll,MySql.Data.dll /out:databases.dll PostgreSql.cs MySql.cs

databases.dll is compiled without problems.

Problem appears when I want to test it creating new project and reference database.dll . Program is compiling but when it try to use dll code it brings the error: TypeInitializationException was unhandled .

I was trying to copy both dlls to the directory where the compilation target is.

I want to ask if there is possible to:

1. Create dll that reference to other dlls.

2. Provide dll to the enduser without referenced dlls and ask them to do so if they want to use each part of the dll. So when coder want to use MySql he have to provide MySql.dll to the compilation.

I hope I made myself clear cause my English ain't perfect ;)

Answer 1

由于Npgsql.dll和MySql.Data.dll都是依赖项DLL，因此您的项目都需要引用它们才能对其进行编译。