dotnet/Documentation/compatibility/wf-serializes-expressions_literal-datetimes-differently.md

WF serializes Expressions.Literal<T> DateTimes differently now (breaks custom XAML parsers)

Scope

Edge

Version Introduced

4.5

Source Analyzer Status

Planned

Change Description

The associated xref:System.Windows.Markup.ValueSerializer object will convert a xref:System.DateTime?displayProperty=name or xref:System.DateTimeOffset?displayProperty=name object whose Second and xref:System.DateTime.Millisecond?displayProperty=name components are non-zero and (for a xref:System.DateTime?displayProperty=name value) whose xref:System.DateTime.Kind property is not Unspecified to property element syntax instead of a string. This change allows xref:System.DateTime?displayProperty=name and xref:System.DateTimeOffset?displayProperty=name values to be round-tripped. Custom XAML parsers that assume that input XAML is in the attribute syntax will not function correctly.

• Quirked
• Build-time break

Recommended Action

This change allows xref:System.DateTime?displayProperty=name and xref:System.DateTimeOffset?displayProperty=name values to be round-tripped. Custom XAML parsers that assume that input XAML is in the attribute syntax will not function correctly.

Affected APIs

• Not detectable via API analysis

Category

Windows Workflow Foundation (WF)