Add LoadFromAsync and SaveToAsync helper methods to DataContent#7159

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copilot/add-helper-methods-data-content

Commits on Jan 5, 2026

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Add LoadFromAsync and SaveToAsync methods to DataContent with MediaTypeMap

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stephentoub
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Fix collection expression syntax for consistency in tests

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stephentoub
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Address review feedback: move MediaTypeMap to polyfills, update DataContent methods

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stephentoub
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Add C# 14 extension member polyfill for File.ReadAllBytesAsync

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Remove name parameter from LoadFromAsync and use MemoryMarshal.TryGetArray in SaveToAsync

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stephentoub
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Switch extension/MIME type mappings to use MediaTypeMap polyfill

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Change return types to ValueTask and add WriteAllBytesAsync polyfill

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stephentoub
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Add FilePolyfills to test project for net462 support

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stephentoub
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Fix path traversal in SaveToAsync, simplify IngestionDocumentReader, add empty path test

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stephentoub
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Simplify extension inference by removing unnecessary null check

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stephentoub
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Use DataContent.LoadFromAsync in MarkItDownMcpReader

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Simplify MarkItDownMcpReader by passing mediaType directly to LoadFromAsync

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stephentoub
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Pre-initialize MemoryStream capacity when stream is seekable

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stephentoub
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Commits on Jan 6, 2026