4.2.0

• .NET 6.0 and .NET 7.0 have been removed as targets as they have both
  reach their end of support from Microsoft. If you are using these versions,
  the .NET Standard 2.1 target should continue working for you.
• .NET 9.0 has been added as a target.
• We now use a mutex rather than a lock statement when opening the
  database. This is done to reduce the likelihood of a race condition
  when process are opening a single database when using
  FileAccessMode.MemoryMappedGlobal.
• Performance improvements. Pull requests by GrAcgoire. GitHub #210, #211
  and #212.

4.1.0

• .NET 5.0 has been removed as a target as it has reach its end of life.
  However, if you are using .NET 5.0, the .NET Standard 2.1 target should
  continue working for you.
• .NET 7.0 and .NET 8.0 have been added as a target.
• Minor performance improvements.

4.0.0

• This library no longer targets .NET 4.6.1.
• .NET 6.0 was added as a target.

3.0.0

• This library now requires .NET Framework 4.6.1 or greater or .NET Standard
  2.0 or greater.
• .NET 5.0 was added as a target framework.
• When decoding strings in a memory-mapped file, the reader no longer
  allocates a temporary byte[]. This significantly improves performance but
  requires the use of unsafe code.
• FileAccessMode.MemoryMapped now works if the database path specified is
  a symbolic link to the actual database.

2.6.1

• netstandard2.1 was added as a target framework.

2.6.0

• This library has been updated to support the nullable reference types
  introduced in C# 8.0.

2.5.0

• A FindAll method was added to the MaxMind.Db.Reader class. This returns
  an enumerator that enumerates over the MaxMind DB database. Pull request by
  Jeff Johnson. GitHub #47.
• A CreateAsync static method was added to asynchronously created a
  MaxMind.Db.Reader object from database file. Pull request by David
  Warner. GitHub #44.
• When deserializing to a class, you may now instruct the reader to set a
  constructor parameter to be the network associated with the record. To do
  this, use the Network attribute. The parameter must be of type
  MaxMind.Db.Network. GitHub #56.
• As part of #44, the optimization to reduce allocations when loading from
  a seekable stream was removed. The optimization could cause poor
  performance in some instances and its behavior with regard to the stream
  position differed from the documented behavior.

2.4.0

• Added FileAccessMode.MemoryMappedGlobal. When used, this will open the file
  in global memory map mode. This requires the "create global objects" right.
  Pull request by David Warner. GitHub #43.

2.3.0

• Reduce the number of allocations when creating a MaxMind.Db.Reader from
  a seekable stream. Pull request by Maarten Balliauw. GitHub #38.
• A netstandard2.0 target was added to eliminate additional dependencies
  required by the netstandard1.4 target. Pull request by Adeel Mujahid.
  GitHub #39.
• As part of the above work, the separate Mono build files were dropped. As
  of Mono 5.0.0, msbuild is supported.

2.2.0

• Switch to the updated MSBuild .NET Core build system. Pull request by Adeel
  Mujahid. GitHub #35.
• Move tests from NUnit to xUnit.net. GitHub #35.