diff --git a/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs b/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
index b4d5c403..86a68c5c 100644
--- a/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/AssignmentOperatorDisabledException.cs
@@ -1,40 +1,33 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
-#endif
 
 namespace DynamicExpresso.Exceptions
 {
-	#if !NETSTANDARD1_6
 	[Serializable]
-	#endif
 	public class AssignmentOperatorDisabledException : ParseException
 	{
 		public AssignmentOperatorDisabledException(string operatorString, int position)
-			: base(string.Format("Assignment operator '{0}' not allowed", operatorString), position) 
+			: base(string.Format("Assignment operator '{0}' not allowed", operatorString), position)
 		{
 			OperatorString = operatorString;
 		}
 
 		public string OperatorString { get; private set; }
 
-		#if !NETSTANDARD1_6
 		protected AssignmentOperatorDisabledException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 			OperatorString = info.GetString("OperatorString");
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			info.AddValue("OperatorString", OperatorString);
 
 			base.GetObjectData(info, context);
 		}
-		#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs b/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
index f27cd00c..ef020711 100644
--- a/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/DuplicateParameterException.cs
@@ -1,39 +1,32 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
-#endif
 
 namespace DynamicExpresso.Exceptions
 {
-#if !NETSTANDARD1_6
 	[Serializable]
-#endif
 	public class DuplicateParameterException : DynamicExpressoException
 	{
 		public DuplicateParameterException(string identifier)
-			: base(string.Format("The parameter '{0}' was defined more than once", identifier)) 
+			: base(string.Format("The parameter '{0}' was defined more than once", identifier))
 		{
 			Identifier = identifier;
 		}
 		public string Identifier { get; private set; }
 
-#if !NETSTANDARD1_6
 		protected DuplicateParameterException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 			Identifier = info.GetString("Identifier");
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			info.AddValue("Identifier", Identifier);
 
 			base.GetObjectData(info, context);
 		}
-#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/DynamicExpressoException.cs b/src/DynamicExpresso.Core/Exceptions/DynamicExpressoException.cs
index c160bb3c..7787e5c0 100644
--- a/src/DynamicExpresso.Core/Exceptions/DynamicExpressoException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/DynamicExpressoException.cs
@@ -1,21 +1,17 @@
-using System;
+using System;
 
 namespace DynamicExpresso.Exceptions
 {
-#if !NETSTANDARD1_6
 	[Serializable]
-#endif
 	public class DynamicExpressoException : Exception
 	{
 		public DynamicExpressoException() { }
 		public DynamicExpressoException(string message) : base(message) { }
 		public DynamicExpressoException(string message, Exception inner) : base(message, inner) { }
 
-#if !NETSTANDARD1_6
 		protected DynamicExpressoException(
 		System.Runtime.Serialization.SerializationInfo info,
 		System.Runtime.Serialization.StreamingContext context)
 			: base(info, context) { }
-#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs b/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
index 5bf400d9..77751488 100644
--- a/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/NoApplicableMethodException.cs
@@ -1,18 +1,14 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
-#endif
 
 namespace DynamicExpresso.Exceptions
 {
-#if !NETSTANDARD1_6
 	[Serializable]
-#endif
 	public class NoApplicableMethodException : ParseException
 	{
 		public NoApplicableMethodException(string methodName, string methodTypeName, int position)
-			: base(string.Format("No applicable method '{0}' exists in type '{1}'", methodName, methodTypeName), position) 
+			: base(string.Format("No applicable method '{0}' exists in type '{1}'", methodName, methodTypeName), position)
 		{
 			MethodTypeName = methodTypeName;
 			MethodName = methodName;
@@ -21,17 +17,15 @@ public NoApplicableMethodException(string methodName, string methodTypeName, int
 		public string MethodTypeName { get; private set; }
 		public string MethodName { get; private set; }
 
-#if !NETSTANDARD1_6
 		protected NoApplicableMethodException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 			MethodTypeName = info.GetString("MethodTypeName");
 			MethodName = info.GetString("MethodName");
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			info.AddValue("MethodName", MethodName);
@@ -39,6 +33,5 @@ public override void GetObjectData(SerializationInfo info, StreamingContext cont
 
 			base.GetObjectData(info, context);
 		}
-#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/ParseException.cs b/src/DynamicExpresso.Core/Exceptions/ParseException.cs
index c1c8e936..f5e699c4 100644
--- a/src/DynamicExpresso.Core/Exceptions/ParseException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/ParseException.cs
@@ -1,19 +1,15 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
-#endif
 using DynamicExpresso.Resources;
 
 namespace DynamicExpresso.Exceptions
 {
-	#if !NETSTANDARD1_6
 	[Serializable]
-	#endif
 	public class ParseException : DynamicExpressoException
 	{
 		public ParseException(string message, int position)
-			: base(string.Format(ErrorMessages.Format, message, position)) 
+			: base(string.Format(ErrorMessages.Format, message, position))
 		{
 			Position = position;
 		}
@@ -26,22 +22,19 @@ public ParseException(string message, int position, Exception innerException)
 
 		public int Position { get; private set; }
 
-		#if !NETSTANDARD1_6
 		protected ParseException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 			Position = info.GetInt32("Position");
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			info.AddValue("Position", Position);
 
 			base.GetObjectData(info, context);
 		}
-		#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs b/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
index c09e3596..67676938 100644
--- a/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/ReflectionNotAllowedException.cs
@@ -1,34 +1,27 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Security.Permissions;
 using System.Runtime.Serialization;
-#endif
 
 namespace DynamicExpresso.Exceptions
 {
-#if !NETSTANDARD1_6
 	[Serializable]
-#endif
 	public class ReflectionNotAllowedException : ParseException
 	{
 		public ReflectionNotAllowedException()
-			: base("Reflection expression not allowed. To enable reflection use Interpreter.EnableReflection().", 0) 
+			: base("Reflection expression not allowed. To enable reflection use Interpreter.EnableReflection().", 0)
 		{
 		}
 
-		#if !NETSTANDARD1_6
 		protected ReflectionNotAllowedException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			base.GetObjectData(info, context);
 		}
-		#endif
 	}
 }
diff --git a/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs b/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
index a5f209b0..00451112 100644
--- a/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
+++ b/src/DynamicExpresso.Core/Exceptions/UnknownIdentifierException.cs
@@ -1,40 +1,33 @@
-#if !NETSTANDARD1_6
 using System;
 using System.Runtime.Serialization;
 using System.Security.Permissions;
-#endif
 
 namespace DynamicExpresso.Exceptions
 {
-#if !NETSTANDARD1_6
 	[Serializable]
-#endif
 	public class UnknownIdentifierException : ParseException
 	{
 		public UnknownIdentifierException(string identifier, int position)
-			: base(string.Format("Unknown identifier '{0}'", identifier), position) 
+			: base(string.Format("Unknown identifier '{0}'", identifier), position)
 		{
 			Identifier = identifier;
 		}
 
 		public string Identifier { get; private set; }
 
-#if !NETSTANDARD1_6
 		protected UnknownIdentifierException(
 			SerializationInfo info,
 			StreamingContext context)
-			: base(info, context) 
+			: base(info, context)
 		{
 			Identifier = info.GetString("Identifier");
 		}
 
-		[SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
 		public override void GetObjectData(SerializationInfo info, StreamingContext context)
 		{
 			info.AddValue("Identifier", Identifier);
 
 			base.GetObjectData(info, context);
 		}
-#endif
 	}
 }