Explicitly specifying FileShare.Read attribute when opening log stream

src/NReco.Logging.File/FileLoggerProvider.cs

@@ -45,7 +45,7 @@
 		private long FileSizeLimitBytes => Options.FileSizeLimitBytes;
 		private int MaxRollingFiles => Options.MaxRollingFiles;
 
 		public LogLevel MinLevel {
 			get => Options.MinLevel;
 			set { Options.MinLevel = value; }
 		}
@@ -82,13 +82,13 @@
 			set { Options.HandleFileError = value; }
 		}
 
 		public FileLoggerProvider(string fileName) : this(fileName, true) {
 		}
 
 		public FileLoggerProvider(string fileName, bool append) : this(fileName, new FileLoggerOptions() { Append = append }) {
 		}
 
 		public FileLoggerProvider(string fileName, FileLoggerOptions options) {
 			Options = options;
 			LogFileName = Environment.ExpandEnvironmentVariables(fileName);
 
@@ -99,7 +99,7 @@
 				TaskCreationOptions.LongRunning);
 		}
 
 		public ILogger CreateLogger(string categoryName) {
 			return loggers.GetOrAdd(categoryName, CreateLoggerImplementation);
 		}
 
@@ -217,7 +217,7 @@
 				// so there is no need for a "manual" check first.
 				fileInfo.Directory.Create();
 
-				LogFileStream = new FileStream(LogFileName, FileMode.OpenOrCreate, FileAccess.Write);
+				LogFileStream = new FileStream(LogFileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read);
 				if (append) {
 					LogFileStream.Seek(0, SeekOrigin.End);
 				} else {