How to solve the "unable to load one or more of the types in the assembly" problem!

These two days have been a headache for "unable to load one or more of the types in the assembly". I believe that there is a lot of need to use reflection to load assembly and dynamically call ass. gettypes () or ass. friends of GetType (string) or createinstance () may encounter this annoying problem like me. This problem is very concealed. Generally, if you encounter this problem during execution of GetType or createinstance, if you choose not to prompt for an error, Program It simply returns NULL. In addition, no documents have been found describing the cause.

Let's take a look at the typical error scenarios:

Assembly ass = assembly. LoadFile (asspath );
T = ass. GetType (typename, false );

It's so obviousCodeBut often this "unable to load one or more of the types in the assembly" error occurs. When the specified type is clearly in this Assembly, an error is reported and null is returned. In addition, some assemblies run normally, while others do not, or even, some sometimes report errors normally, which is nothing to say to Bill.

After several twists and turns, we found the solution: replace LoadFile with loadfrom:

Assembly ass = assembly. loadfrom (asspath );
T = ass. GetType (typename, false );

It is really simple. I want to laugh, but I have found countless circles on the Internet, but countless friends have not tried to do so and I am worried.

Compare the descriptions of Assembly. LoadFile and assembly. loadfrom in msdn:

Assembly. LoadFile:
Note: This namespace, class, or member is supported only in version 1.1 of the. NET Framework.
Loads the contents of an assembly file.

Assembly. loadfrom:
Loads an assembly.

In addition, there are no different instructions!

Without saying anything, you can only sigh that Uncle Bill has been playing the game again ~~