Lambdas are probably the fastest way to write anonymous function. But it’s also an easy way to create it in a way that captures variable creating unnecessary allocations.
There’s an easy way to detect those. Just add static keyword to your lambda so that accidental captures are detected by the compiler.
Link to the docs: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-9.0/static-anonymous-functions
// use the static ✅ keyword to prevent accidental capture of local variable or input parameter
data.Where(static x => x.CreatedBy == "admin");