Merge pull request #514 from tonyhallett/fix-line-coverage-file-deletion

fix

Author: tonyhallett

SharedProject/Editor/DynamicCoverage/Utilities/TextInfo.cs

@@ -36,7 +36,7 @@ public TextInfo(ITextView textView, ITextBuffer textBuffer)
         public ITextView TextView { get; }
         public ITextBuffer2 TextBuffer { get; }
         public string FilePath => this.TextDocument?.FilePath;
-        public string GetFileText() => File.ReadAllText(this.FilePath);
+        public string GetFileText() => File.Exists(this.FilePath) ? File.ReadAllText(this.FilePath) : null;
         public DateTime GetLastWriteTime() => new FileInfo(this.FilePath).LastWriteTime;
     }
 }