new CrmServiceClient(connectionString); Toss Error =>Error while connecting to CRM Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified

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Posted on by johnnyL Microsoft Employee

Hi,

I am trying to follow what it takes to fix the WSTrust issues

https://docs.microsoft.com/en-us/powerapps/developer/common-data-service/authenticate-office365-deprecation

According to this, the only chg needs to be done is:

If your code is using CrmServiceClient with the “Office365” authentication type:

An example of this is a connections string that looks like this:

connectionString = "AuthType=Office365;Username=jsmith@contoso.onmicrosoft.com;Password=passcode;Url=https://contoso.crm.dynamics.com"

Similarly, you could also use a CrmServiceClient constructor and pass in AuthType.Office365.

You have two options for dealing with this.

Switch over to using an OAuth based connection string. Such connection string looks like this:
connectionString = "AuthType=OAuth;Username=jsmith@contoso.onmicrosoft.com; Password=passcode;Url=https://contosotest.crm.dynamics.com;AppId=51f81489-12ee-4a9e-aaae-a2591f45987d; RedirectUri=app://58145B91-0C36-4500-8554-080854F2AC97;LoginPrompt=Auto"

***

In my code after above fix, while the compile is fine, during runtime, this is tossing this error in the "new CrmServiceClient(connectionString)"

==> Error while connecting to CRM Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

Any idea what I need to do to fix this? Thanks.

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Power Apps Pro Dev & ISV

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johnnyL Microsoft Employee on at

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Hi,

This item is closed. The root cause of this is we had corrupted the VS nuget. We started debugging with just a console app, got it running. Then we created an azure function (this is where our code actually runs) and added / updated the nuget as needed to match our current azure function.

Thanks everyone.

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Bhautik 2 on at

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Hi Johnny

I am facing exact same issue.

I took the all latest nugate packages.. can you please mention which package you are referring ?

The Azure function throws following error if i run from Azure function
Could not load file or assembly 'System.Web.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
@johnnyL wrote:
Hi,

This item is closed. The root cause of this is we had corrupted the VS nuget. We started debugging with just a console app, got it running. Then we created an azure function (this is where our code actually runs) and added / updated the nuget as needed to match our current azure function.

Thanks everyone.

Was this reply helpful? Yes No