Managed Resources Editor (Legacy) corrupts Resources.resx and Resources.Designer.cs file

[th-joerger]

Visual Studio Version

17.12.0 Preview 1.0

Summary

Managed Resources Editor (Legacy) corrupts Resources.resx and Resources.Designer.cs file.

Steps to Reproduce

1. Open Resources.resx with Managed Resources Editor (Legacy).
2. Perform any change on a file resource and save.
3. In Resources.resx, reference to utf-8 are removed. In Resources.Designer.cs, auto-generated comments are borked as well.

<data name="LabDescription" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Resources\LabDescription.txt;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=c44a5c334534e089;utf-8</value>
+    <value>..\Resources\LabDescription.txt;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=c44a5c334534e089</value>
</data>

Expected Behavior

Parse file correctly and don't mess up when saving.

Actual Behavior

Parse file incorrectly and mess up saving.

User Impact

Huge file Resources.Designer.cs corrupted.