Could not load file or assembly

Question

In my power shell script I am loading a custom assembly and then instantiating a class of that assembly by New-Object.

Assembly.LoadFile() executes successfully but New-Object statement gives the bellow exception.

New-Object : Exception calling ".ctor" with "1" argument(s): "Could not load file or assembly 'MyAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of i
ts dependencies. The system cannot find the file specified."

Script:

[System.Reflection.Assembly]::LoadFile("MyAssembly.dll")
$a=New-Object MyAssembly.MyClass -ArgumentList "arg1"

This custom assembly references only the following assemblies

System
System.Core
System.Runtime.Serialization
System.Xml.Linq
System.Data
System.Xml

I tried explicitly loading the System.Runtime.Serialization dll like below. But same exception

[System.Reflection.Assembly]::Load("System.Runtime.Serialization, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")

Any idea?

Answer 1

Don't use LoadFile. Since you are using Powershell V2, the preferred method is Add-Type

Add-Type -AssemblyName "MyLibrary.dll" 

http://www.dougfinke.com/blog/index.php/2010/08/29/how-to-load-net-assemblies-in-a-powershell-session/ has a good list of the different ways available to import a library into the current shell runspace.

http://technet.microsoft.com/en-us/library/hh849914.aspx is the technet documentaion on Add-Type and has examples including how to use static methods in a loaded library