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Use ReadOnlyMemory<byte> for binary data to eliminate UTF-16 transcoding (#1070)

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>
Co-authored-by: ericstj <8918108+ericstj@users.noreply.github.com>
Co-authored-by: Eric StJohn <ericstj@microsoft.com>
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Copilot 2026-02-19 14:08:05 -08:00 • committed by GitHub
commit 80b1ad21d7
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1 changed files with 400 additions and 103 deletions
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8
tests/ModelContextProtocol.Tests/Client/McpClientToolTests.cs
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@ -37,13 +37,13 @@ public class McpClientToolTests : ClientServerTestBase
[McpServerTool]
public static ImageContentBlock ImageTool() =>
new()
{ Data = Convert.ToBase64String(Encoding.UTF8.GetBytes("fake-image-data")), MimeType = "image/png" };
{ Data = System.Text.Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes("fake-image-data"))), MimeType = "image/png" };
// Tool that returns audio content as single ContentBlock
[McpServerTool]
public static AudioContentBlock AudioTool() =>
new()
{ Data = Convert.ToBase64String(Encoding.UTF8.GetBytes("fake-audio-data")), MimeType = "audio/mp3" };
{ Data = System.Text.Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes("fake-audio-data"))), MimeType = "audio/mp3" };
// Tool that returns embedded resource
[McpServerTool]
@ -103,7 +103,7 @@ public class McpClientToolTests : ClientServerTestBase
[McpServerTool]
public static IEnumerable<ContentBlock> MixedWithNonConvertibleTool()
{
yield return new ImageContentBlock { Data = Convert.ToBase64String(Encoding.UTF8.GetBytes("image-data")), MimeType = "image/png" };
yield return new ImageContentBlock { Data = System.Text.Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes("image-data"))), MimeType = "image/png" };
yield return new ResourceLinkBlock { Uri = "file://linked.txt", Name = "linked.txt" };
}
@ -152,7 +152,7 @@ public class McpClientToolTests : ClientServerTestBase
Resource = new BlobResourceContents
{
Uri = "data://blob",
Blob = Convert.ToBase64String(Encoding.UTF8.GetBytes("binary-data")),
Blob = System.Text.Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes("binary-data"))),
MimeType = "application/octet-stream"
}
};