Could not load file or assembly 'someProject' or one of its dependencies. Access is denied

Question

I am stuck with one asp.net error. My application work fine on development and test environemnt. But on production it give me following error:

Could n

Answer 1

After deploying a new Web API project to our web farm, one of our web servers was malfunctioning and giving the error:

Could not load file or assembly 'Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. Access is denied.

It turns out the folder hosting the Web API site was missing permissions for IIS_IUSRS. Adding the user with Read, Read & execute, and List folder contents permissions fixed the issue.