[dotnet] Fix nullability warnings in `WebDriver`

[RenderMichael]

User description

Fixes an internal warning.

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PR Type

Bug fix

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Description

• Add nullable annotation to network field in WebDriver class

• Resolves C# nullability warnings during compilation

• Improves code safety with explicit null-handling semantics

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Diagram Walkthrough

flowchart LR
  A["WebDriver.cs"] -- "Add ? to NetworkManager field" --> B["Nullable NetworkManager"]
  B -- "Resolves nullability warnings" --> C["Cleaner compilation"]

File Walkthrough

	Relevant files
Bug fix	WebDriver.cs Add nullable annotation to network field                                  dotnet/src/webdriver/WebDriver.cs Changed private NetworkManager network; to private NetworkManager? network; Added nullable reference type annotation to the network field Addresses C# nullability compiler warnings +1/-1

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[qodo-code-review[bot]]

PR Compliance Guide 🔍

Below is a summary of compliance checks for this PR:

Security Compliance
🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
Ticket Compliance
⚪	🎫 No ticket provided [ ] Create ticket/issue <!-- /create_ticket --create_ticket=true -->
Codebase Duplication Compliance
⚪	Codebase context is not defined Follow the guide to enable codebase context checks.
Custom Compliance
🟢	Generic: Meaningful Naming and Self-Documenting Code Objective: Ensure all identifiers clearly express their purpose and intent, making code self-documenting Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Error Handling Objective: To prevent the leakage of sensitive system information through error messages while providing sufficient detail for internal debugging. Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Secure Logging Practices Objective: To ensure logs are useful for debugging and auditing without exposing sensitive information like PII, PHI, or cardholder data. Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Security-First Input Validation and Data Handling Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent vulnerabilities Status: Passed Learn more about managing compliance generic rules or creating your own custom rules
⚪	Generic: Comprehensive Audit Trails Objective: To create a detailed and reliable record of critical system actions for security analysis and compliance. Status: No new auditing: The added nullable annotation does not introduce or modify any logging for critical actions, and based on the diff alone we cannot confirm audit trail coverage. Referred Code private NetworkManager? network; private WebElementFactory elementFactory; Learn more about managing compliance generic rules or creating your own custom rules
	Generic: Robust Error Handling and Edge Case Management Objective: Ensure comprehensive error handling that provides meaningful context and graceful degradation Status: Null handling context: Marking network as nullable suggests null is possible, but the diff does not show corresponding null checks or error handling where network is used. Referred Code private NetworkManager? network; private WebElementFactory elementFactory; Learn more about managing compliance generic rules or creating your own custom rules
[ ] Update <!-- /compliance --update_compliance=true -->

Compliance status legend

🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label

[qodo-code-review[bot]]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Learned best practice	Guard nullable field usage Guard all usages of network with a null check or initialize it via constructor/factory to a non-null instance to avoid runtime null reference risks. dotnet/src/webdriver/WebDriver.cs [43] +private NetworkManager network = new NetworkManager(); + +// Or, if optional: private NetworkManager? network; +private NetworkManager Network => network ?? throw new InvalidOperationException("NetworkManager not initialized."); + [ ] Apply / Chat <!-- /improve --apply_suggestion=0 --> Suggestion importance[1-10]: 6 __ Why: Relevant best practice - Validate and sanitize external inputs; avoid null-dereference by checking optional dependencies before use.	Low
[ ] Update <!-- /improve_multi --more_suggestions=true -->

[RenderMichael]

CI is broken and it will not give any useful results to wait for it; previous runs showed green CI.