System.IO.Compression.Deflater.Deflater C# (CSharp) Method

        internal Deflater(CompressionLevel compressionLevel, int windowBits)
        {
            Debug.Assert(windowBits >= minWindowBits && windowBits <= maxWindowBits);
            ZLibNative.CompressionLevel zlibCompressionLevel;
            int memLevel;

            switch (compressionLevel)
            {
                // See the note in ZLibNative.CompressionLevel for the recommended combinations.

                case CompressionLevel.Optimal:
                    zlibCompressionLevel = ZLibNative.CompressionLevel.DefaultCompression;
                    memLevel = ZLibNative.Deflate_DefaultMemLevel;
                    break;

                case CompressionLevel.Fastest:
                    zlibCompressionLevel = ZLibNative.CompressionLevel.BestSpeed;
                    memLevel = ZLibNative.Deflate_DefaultMemLevel;
                    break;

                case CompressionLevel.NoCompression:
                    zlibCompressionLevel = ZLibNative.CompressionLevel.NoCompression;
                    memLevel = ZLibNative.Deflate_NoCompressionMemLevel;
                    break;

                default:
                    throw new ArgumentOutOfRangeException(nameof(compressionLevel));
            }

            ZLibNative.CompressionStrategy strategy = ZLibNative.CompressionStrategy.DefaultStrategy;

            DeflateInit(zlibCompressionLevel, windowBits, memLevel, strategy);
        }