Invoke Code: No compiled code to run - error CS0234: The type or namespace name 'Xml' does not exist in the namespace 'System.Security.Cryptography' (are you missing an assembly reference?)

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1

Hi all,

I am using invoke code to run a C# code to do the following.

This code takes an incoming SOAP message, ensures it has a proper SOAP body (and creates one if needed), adds or verifies a SOAP header and WS-Security elements, and assigns a unique ID to the body. It then loads an X.509 certificate from a given file and embeds the certificate into the message as a BinarySecurityToken under the WS-Security header. Next, it digitally signs the SOAP body by creating a signature reference to the body ID, applying exclusive canonicalization with specified namespace prefixes, and builds the appropriate KeyInfo, including a SecurityTokenReference that points to the certificate. Finally, it computes the digital signature, appends it to the WS-Security header, and outputs the fully signed SOAP envelope.

Though I have imported all the required namespaces, I get the following error saying - Xml does not exist in the namespace System.Security.Cryptography.

The image displays an error message indicating that the namespace 'Xml' does not exist in 'System.Security.Cryptography', suggesting a missing assembly reference, at line 67. (Captioned by AI)
The image displays an error message indicating that the namespace 'Xml' does not exist in 'System.Security.Cryptography', suggesting a missing assembly reference, at line 67. (Captioned by AI)525×432 10.9 KB

I am using stuido verions 24.10.10

Thanks in advance.

My C# code:
C#SignedSoapRequest.txt (5.1 KB)

Regards
Sundar

3

Hi @Sundararaman_S1

Check the below thread

Hope it helps!!

4

@Sundararaman_S1,

Install the package UiPath.Cryptography.Activities

The image shows the "Manage Packages" window in UiPath Studio, with the "UiPath.Cryptography.Activities" package selected for installation, displaying its details such as version, author, and dependencies. (Captioned by AI)
The image shows the "Manage Packages" window in UiPath Studio, with the "UiPath.Cryptography.Activities" package selected for installation, displaying its details such as version, author, and dependencies. (Captioned by AI)903×504 70.8 KB

Imports the namespace - System.Security.Cryptography.Xml - through Imports panel

The image shows a software development environment screen with a list of imported namespaces, highlighting "System.Security.Cryptography.Xml" in the "Imports" section. (Captioned by AI)
The image shows a software development environment screen with a list of imported namespaces, highlighting "System.Security.Cryptography.Xml" in the "Imports" section. (Captioned by AI)1919×458 143 KB

Let me know if anywhere you stuck.

5

Hi

I imported the required namespace and also installed Cryptography package. It still gives the same error.

6

Hi

The assembly reference is already present in the xaml. I verified by opening in notepad++.