Code Compiles in Visual Studio But Editor Shows Error

using NuGet CrC32.NET
compiles In visual studio.But when i open Unity Editor It shoes the error shown below

error CS0246: The type or namespace name ‘Force’ could not be found (are you missing a using directive or an assembly reference?

can anyone help me how to fix it

Nothing you do in Visual Studio matters to Unity.

Look into adding that CRC32 package through the Unity Package Mangler.