docs(assertions): document Custom Expect Message for C##40566
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Extends the Custom Expect Message section to cover C# alongside Python, with matching call-site and error-output examples. References microsoft/playwright-dotnet#2161
yury-s
approved these changes
May 1, 2026
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Summary
Extends the existing Python-only "Custom Expect Message" section in
docs/src/test-assertions-csharp-java-python.mdto also cover C#, with matching call-site and error-output examples. Pairs with microsoft/playwright-dotnet#3309 which adds theExpect(thing, message)overloads.References microsoft/playwright-dotnet#2161