Add API diff between .NET Core 3.0 preview5 and preview6. (#2841)

* Add API diff between .NET Core 3.0 preview5 and preview6.

* Fix title in Standalon-packages.md file

release-notes/3.0/preview/api-diff/preview6/3.0-preview6.md

@@ -0,0 +1,37 @@
+# API Difference netcoreapp3.0-preview5 vs netcoreapp3.0-preview6
+
+API listing follows standard diff formatting. Lines preceded by a '+' are
+additions and a '-' indicates removal.
+
+* [Microsoft.VisualBasic](3.0-preview6_Microsoft.VisualBasic.md)
+* [Microsoft.VisualBasic.ApplicationServices](3.0-preview6_Microsoft.VisualBasic.ApplicationServices.md)
+* [Microsoft.VisualBasic.Devices](3.0-preview6_Microsoft.VisualBasic.Devices.md)
+* [Microsoft.VisualBasic.MyServices](3.0-preview6_Microsoft.VisualBasic.MyServices.md)
+* [System](3.0-preview6_System.md)
+* [System.Collections.Generic](3.0-preview6_System.Collections.Generic.md)
+* [System.Collections.Immutable](3.0-preview6_System.Collections.Immutable.md)
+* [System.ComponentModel](3.0-preview6_System.ComponentModel.md)
+* [System.Data](3.0-preview6_System.Data.md)
+* [System.Data.Common](3.0-preview6_System.Data.Common.md)
+* [System.Diagnostics.CodeAnalysis](3.0-preview6_System.Diagnostics.CodeAnalysis.md)
+* [System.Diagnostics.Tracing](3.0-preview6_System.Diagnostics.Tracing.md)
+* [System.Drawing](3.0-preview6_System.Drawing.md)
+* [System.IO](3.0-preview6_System.IO.md)
+* [System.Linq](3.0-preview6_System.Linq.md)
+* [System.Net.Http](3.0-preview6_System.Net.Http.md)
+* [System.Net.Security](3.0-preview6_System.Net.Security.md)
+* [System.Net.Sockets](3.0-preview6_System.Net.Sockets.md)
+* [System.Numerics](3.0-preview6_System.Numerics.md)
+* [System.Reflection](3.0-preview6_System.Reflection.md)
+* [System.Reflection.Emit](3.0-preview6_System.Reflection.Emit.md)
+* [System.Runtime.CompilerServices](3.0-preview6_System.Runtime.CompilerServices.md)
+* [System.Runtime.InteropServices](3.0-preview6_System.Runtime.InteropServices.md)
+* [System.Runtime.Intrinsics.X86](3.0-preview6_System.Runtime.Intrinsics.X86.md)
+* [System.Text.Encodings.Web](3.0-preview6_System.Text.Encodings.Web.md)
+* [System.Text.Json](3.0-preview6_System.Text.Json.md)
+* [System.Text.Json.Serialization](3.0-preview6_System.Text.Json.Serialization.md)
+* [System.Text.Unicode](3.0-preview6_System.Text.Unicode.md)
+* [System.Threading](3.0-preview6_System.Threading.md)
+* [System.Threading.Tasks](3.0-preview6_System.Threading.Tasks.md)
+* [System.Xml.Schema](3.0-preview6_System.Xml.Schema.md)
+

release-notes/3.0/preview/api-diff/preview6/3.0-preview6_Microsoft.VisualBasic.ApplicationServices.md

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+# Microsoft.VisualBasic.ApplicationServices
+
+``` diff
+ namespace Microsoft.VisualBasic.ApplicationServices {
+     public class ApplicationBase {
++        public AssemblyInfo Info { get; }
+     }
++    public class AssemblyInfo {
++        public AssemblyInfo(Assembly currentAssembly);
++        public string AssemblyName { get; }
++        public string CompanyName { get; }
++        public string Copyright { get; }
++        public string Description { get; }
++        public string DirectoryPath { get; }
++        public ReadOnlyCollection<Assembly> LoadedAssemblies { get; }
++        public string ProductName { get; }
++        public string StackTrace { get; }
++        public string Title { get; }
++        public string Trademark { get; }
++        public Version Version { get; }
++        public long WorkingSet { get; }
++    }
++    public class ConsoleApplicationBase : ApplicationBase {
++        public ConsoleApplicationBase();
++        public ReadOnlyCollection<string> CommandLineArgs { get; }
++        protected ReadOnlyCollection<string> InternalCommandLine { set; }
++    }
+ }
+```
+

release-notes/3.0/preview/api-diff/preview6/3.0-preview6_Microsoft.VisualBasic.Devices.md

@@ -0,0 +1,13 @@
+# Microsoft.VisualBasic.Devices
+
+``` diff
+ namespace Microsoft.VisualBasic.Devices {
+     public class ComputerInfo {
++        public ulong AvailablePhysicalMemory { get; }
++        public ulong AvailableVirtualMemory { get; }
++        public ulong TotalPhysicalMemory { get; }
++        public ulong TotalVirtualMemory { get; }
+     }
+ }
+```
+

release-notes/3.0/preview/api-diff/preview6/3.0-preview6_Microsoft.VisualBasic.MyServices.md

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+# Microsoft.VisualBasic.MyServices
+
+``` diff
+ namespace Microsoft.VisualBasic.MyServices {
+     public class FileSystemProxy {
++        public string CurrentDirectory { get; set; }
++        public ReadOnlyCollection<DriveInfo> Drives { get; }
++        public string CombinePath(string baseDirectory, string relativePath);
++        public void CopyDirectory(string sourceDirectoryName, string destinationDirectoryName);
++        public void CopyDirectory(string sourceDirectoryName, string destinationDirectoryName, UIOption showUI);
++        public void CopyDirectory(string sourceDirectoryName, string destinationDirectoryName, UIOption showUI, UICancelOption onUserCancel);
++        public void CopyDirectory(string sourceDirectoryName, string destinationDirectoryName, bool overwrite);
++        public void CopyFile(string sourceFileName, string destinationFileName);
++        public void CopyFile(string sourceFileName, string destinationFileName, UIOption showUI);
++        public void CopyFile(string sourceFileName, string destinationFileName, UIOption showUI, UICancelOption onUserCancel);
++        public void CopyFile(string sourceFileName, string destinationFileName, bool overwrite);
++        public void CreateDirectory(string directory);
++        public void DeleteDirectory(string directory, DeleteDirectoryOption onDirectoryNotEmpty);
++        public void DeleteDirectory(string directory, UIOption showUI, RecycleOption recycle);
++        public void DeleteDirectory(string directory, UIOption showUI, RecycleOption recycle, UICancelOption onUserCancel);
++        public void DeleteFile(string file);
++        public void DeleteFile(string file, UIOption showUI, RecycleOption recycle);
++        public void DeleteFile(string file, UIOption showUI, RecycleOption recycle, UICancelOption onUserCancel);
++        public bool DirectoryExists(string directory);
++        public bool FileExists(string file);
++        public ReadOnlyCollection<string> FindInFiles(string directory, string containsText, bool ignoreCase, SearchOption searchType);
++        public ReadOnlyCollection<string> FindInFiles(string directory, string containsText, bool ignoreCase, SearchOption searchType, params string[] fileWildcards);
++        public ReadOnlyCollection<string> GetDirectories(string directory);
++        public ReadOnlyCollection<string> GetDirectories(string directory, SearchOption searchType, params string[] wildcards);
++        public DirectoryInfo GetDirectoryInfo(string directory);
++        public DriveInfo GetDriveInfo(string drive);
++        public FileInfo GetFileInfo(string file);
++        public ReadOnlyCollection<string> GetFiles(string directory);
++        public ReadOnlyCollection<string> GetFiles(string directory, SearchOption searchType, params string[] wildcards);
++        public string GetName(string path);
++        public string GetParentPath(string path);
++        public string GetTempFileName();
++        public void MoveDirectory(string sourceDirectoryName, string destinationDirectoryName);
++        public void MoveDirectory(string sourceDirectoryName, string destinationDirectoryName, UIOption showUI);
++        public void MoveDirectory(string sourceDirectoryName, string destinationDirectoryName, UIOption showUI, UICancelOption onUserCancel);
++        public void MoveDirectory(string sourceDirectoryName, string destinationDirectoryName, bool overwrite);
++        public void MoveFile(string sourceFileName, string destinationFileName);
++        public void MoveFile(string sourceFileName, string destinationFileName, UIOption showUI);
++        public void MoveFile(string sourceFileName, string destinationFileName, UIOption showUI, UICancelOption onUserCancel);
++        public void MoveFile(string sourceFileName, string destinationFileName, bool overwrite);
++        public TextFieldParser OpenTextFieldParser(string file);
++        public TextFieldParser OpenTextFieldParser(string file, params int[] fieldWidths);
++        public TextFieldParser OpenTextFieldParser(string file, params string[] delimiters);
++        public StreamReader OpenTextFileReader(string file);
++        public StreamReader OpenTextFileReader(string file, Encoding encoding);
++        public StreamWriter OpenTextFileWriter(string file, bool append);
++        public StreamWriter OpenTextFileWriter(string file, bool append, Encoding encoding);
++        public byte[] ReadAllBytes(string file);
++        public string ReadAllText(string file);
++        public string ReadAllText(string file, Encoding encoding);
++        public void RenameDirectory(string directory, string newName);
++        public void RenameFile(string file, string newName);
++        public void WriteAllBytes(string file, byte[] data, bool append);
++        public void WriteAllText(string file, string text, bool append);
++        public void WriteAllText(string file, string text, bool append, Encoding encoding);
+     }
+ }
+```
+