PowerShell Error: Add-Type: Could not load file or assembly ‘file:///C:Program FilesCommon FilesMicrosoft SharedWeb Server Extensions15ISAPIMicrosoft.SharePoint.Client.dll’ or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded

Problem: 
When trying to write a client side PowerShell script for SharePoint online, got an error:

Error: Add-Type : Could not load file or assembly ‘file:///C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.dll’ or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

Add-Type: Could not load file or assembly Microsoft.SharePoint.Client.dll or one of its  dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded

Verified SharePoint Server 2013 Client Components SDK is already installed to use Client side assemblies. (if not,  You can download it from: http://www.microsoft.com/en-us/download/details.aspx?id=35585)

Solution:

You need to have PowerShell 3.0 to use Client-side assemblies of SharePoint online. So, download and install “Windows Management Framework 3.0” at https://www.microsoft.com/en-us/download/details.aspx?id=34595

Tips: To get your currently installed PowerShell version, type: $PSVersionTable

Salaudeen Rajack

Salaudeen Rajack is a SharePoint Architect with Two decades of SharePoint Experience. He loves sharing his knowledge and experiences with the SharePoint community, through his real-world articles!

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