Use interpolated strings in place of StringBuilder.AppendFormat where possible.
#62160
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src/libraries/Microsoft.Extensions.DependencyInjection/src/CallSiteJsonFormatter.cs
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This PR converts all calls to
StringBuilder.AppendFormatin non-test code to instead useStringBuilder.Appendwith interpolated strings, taking advantage of the .NET 6 interpolated string handlers, that allocate zero intermediate objects, writing the characters directly to theStringBuilderin our case.Call sites where the format strings were obtained from resources could not be optimized and were not changed.
Earlier frameworks might see a slightly decreased performance but the changed code does not seem to be performance-critical.