diff --git a/AssimpNet/MemoryHelper.cs b/AssimpNet/MemoryHelper.cs
index 459270c..5044bd9 100755
--- a/AssimpNet/MemoryHelper.cs
+++ b/AssimpNet/MemoryHelper.cs
@@ -382,11 +382,7 @@ public static void MarshalStructure<T>(IntPtr ptr, out T value) where T : struct
                 return;
             }
 
-#if NETSTANDARD1_3
             value = Marshal.PtrToStructure<T>(ptr);
-#else
-            value = (T) Marshal.PtrToStructure(ptr, type);
-#endif
         }
 
         /// <summary>
@@ -407,11 +403,7 @@ public static T MarshalStructure<T>(IntPtr ptr) where T : struct
             if (HasNativeCustomMarshaler(type, out marshaler))
                 return (T) marshaler.MarshalNativeToManaged(ptr);
 
-#if NETSTANDARD1_3
             return Marshal.PtrToStructure<T>(ptr);
-#else
-            return (T) Marshal.PtrToStructure(ptr, type);
-#endif
         }
 
         /// <summary>
@@ -433,11 +425,7 @@ public static void MarshalPointer<T>(in T value, IntPtr ptr) where T : struct
                 return;
             }
 
-#if NETSTANDARD1_3
             Marshal.StructureToPtr<T>(value, ptr, true);
-#else
-            Marshal.StructureToPtr((object)value, ptr, true);
-#endif
         }
 
         /// <summary>
@@ -454,11 +442,7 @@ public static unsafe int MarshalSizeOf<T>() where T : struct
             if (HasNativeCustomMarshaler(type, out marshaler))
                 return marshaler.NativeDataSize;
 
-#if NETSTANDARD1_3
             return Marshal.SizeOf<T>();
-#else
-            return Marshal.SizeOf(type);
-#endif
         }
 
         /// <summary>
@@ -836,11 +820,9 @@ public static int Count<T>(IEnumerable<T> source)
             if(otherColl != null)
                 return otherColl.Count;
 
-#if NETSTANDARD1_3
             IReadOnlyCollection<T> roColl = source as IReadOnlyCollection<T>;
             if(roColl != null)
                 return roColl.Count;
-#endif
 
             int count = 0;
             using(IEnumerator<T> enumerator = source.GetEnumerator())
diff --git a/AssimpNet/Unmanaged/PlatformHelper.cs b/AssimpNet/Unmanaged/PlatformHelper.cs
index cdc493a..c550c59 100644
--- a/AssimpNet/Unmanaged/PlatformHelper.cs
+++ b/AssimpNet/Unmanaged/PlatformHelper.cs
@@ -26,48 +26,6 @@
 
 namespace Assimp.Unmanaged
 {
-  /*
-#if !NETSTANDARD1_3
-    internal enum OSPlatform
-    {
-        Windows = 0,
-        Linux = 1,
-        OSX = 2
-    }
-
-    internal static class RuntimeInformation
-    {
-        private static OSPlatform s_platform;
-
-        static RuntimeInformation()
-        {
-            switch (Environment.OSVersion.Platform)
-            {
-                case PlatformID.Unix:
-                    if (Directory.Exists("/Applications") && Directory.Exists("/System") && Directory.Exists("/Users") && Directory.Exists("/Volumes"))
-                        s_platform = OSPlatform.OSX;
-                    else
-                        s_platform = OSPlatform.Linux;
-                    break;
-                case PlatformID.MacOSX:
-                    s_platform = OSPlatform.OSX;
-                    break;
-                default:
-                    s_platform = OSPlatform.Windows;
-                    break;
-            }
-        }
-
-        public static bool IsOSPlatform(OSPlatform osPlat)
-        {
-            return s_platform == osPlat;
-        }
-
-        // Non-net standard will be windows only
-        public static string OSDescription { get { return "Microsoft Windows"; } }
-    }
-#endif
-  */
     //Helper class for making it easier to access certain reflection methods on types between .Net framework and .Net standard (pre-netstandard 2.0)
     internal class PlatformHelper
     {
diff --git a/AssimpNet/Unmanaged/UnmanagedStructures.cs b/AssimpNet/Unmanaged/UnmanagedStructures.cs
index 576448c..c7c981c 100755
--- a/AssimpNet/Unmanaged/UnmanagedStructures.cs
+++ b/AssimpNet/Unmanaged/UnmanagedStructures.cs
@@ -399,25 +399,7 @@ public static string GetFormatHint(in AiTexture aiTex)
         {
             fixed (sbyte* charPtr = aiTex.FormatHint)
             {
-#if !NETSTANDARD1_3
                 return new string(charPtr);
-#else
-                //Determine how many actual characters there are...
-                int maxLen = s_nullFormat.Length;
-                int nonTerminatorCount = 0;
-                for(int i = 0; i < maxLen; i++)
-                {
-                    if(aiTex.FormatHint[i] == '\0')
-                        break;
-
-                    nonTerminatorCount++;
-                }
-
-                if(nonTerminatorCount == 0)
-                    return String.Empty;
-
-                return Encoding.ASCII.GetString((byte*) charPtr, nonTerminatorCount);
-#endif
             }
         }
     }