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NullReferenceException in exception handling code from ImageSourceConverter.ConvertFrom

Scope

Edge

Version Introduced

4.7

Source Analyzer Status

NotPlanned

Change Description

An error in the exception handling code for ImageSourceConverter.ConvertFrom caused an incorrect NullReferenceException to be thrown instead of the intended exception (e.g. DirectoryNotFoundException , FileNotFoundException), this change corrects that error so that the method now throws the right exception. By default all applications targeting .NET Framework 4.6.2 and below will continue to throw NullReferenceException for compatibility, developers targeting .NET Framework 4.7 and above should see the right exceptions.

// Replace the space with an 'x' if applicable

Quirked
Build-time break

Recommended Action

Developers who wish to revert to getting NullReferenceException when targeting .NET Framework 4.7 can add/merge the following to their application's App.config file:

<configuration>
    <runtime>
        <AppContextSwitchOverrides value="Switch.System.Windows.Media.ImageSourceConverter.OverrideExceptionWithNullReferenceException=true"/>
    </runtime>
</configuration>

Affected APIs

M:System.Windows.Media.ImageSourceConverter.ConvertFrom(System.ComponentModel.ITypeDescriptorContext,System.Globalization.CultureInfo,System.Object)

1.5 KiB Raw Blame History