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-rw-r--r--src/csharp/Grpc.Core/Metadata.cs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index 0e4456278c..281952d6d4 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -225,7 +225,7 @@ namespace Grpc.Core
/// </summary>
public class Entry
{
- private static readonly Regex ValidKeyRegex = new Regex("^[a-z0-9_-]+$");
+ private static readonly Regex ValidKeyRegex = new Regex("^[.a-z0-9_-]+$");
readonly string key;
readonly string value;
@@ -360,7 +360,7 @@ namespace Grpc.Core
{
var normalized = GrpcPreconditions.CheckNotNull(key, "key").ToLowerInvariant();
GrpcPreconditions.CheckArgument(ValidKeyRegex.IsMatch(normalized),
- "Metadata entry key not valid. Keys can only contain lowercase alphanumeric characters, underscores and hyphens.");
+ "Metadata entry key not valid. Keys can only contain lowercase alphanumeric characters, underscores, hyphens and dots.");
return normalized;
}