Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/System.IO.Compression/SharpCompress/Common/Zip/Headers/ZipHeader.cs

@@ -0,0 +1,21 @@
+using System.IO;
+
+namespace SharpCompress.Common.Zip.Headers
+{
+    internal abstract class ZipHeader
+    {
+        protected ZipHeader(ZipHeaderType type)
+        {
+            ZipHeaderType = type;
+            HasData = true;
+        }
+
+        internal ZipHeaderType ZipHeaderType { get; private set; }
+
+        internal abstract void Read(BinaryReader reader);
+
+        internal abstract void Write(BinaryWriter writer);
+
+        internal bool HasData { get; set; }
+    }
+}