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Diffstat (limited to 'src/csharp/Grpc.Core/Metadata.cs')
| -rw-r--r-- | src/csharp/Grpc.Core/Metadata.cs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs index 122c1e8883..a9aa2cbbfc 100644 --- a/src/csharp/Grpc.Core/Metadata.cs +++ b/src/csharp/Grpc.Core/Metadata.cs @@ -361,7 +361,10 @@ namespace Grpc.Core GrpcPreconditions.CheckArgument(IsValidKey(key, out bool isLowercase), "Metadata entry key not valid. Keys can only contain lowercase alphanumeric characters, underscores, hyphens and dots."); if (isLowercase) + { + // save allocation of a new string if already lowercase return key; + } return key.ToLowerInvariant(); } |