diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index d31bae48..75a2efe1 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -4,9 +4,9 @@ name: CodeQL analysis
 
 on:
   push:
-    branches: [master, develop]
+    branches: [master, develop, v8]
   pull_request:
-    branches: [master, develop]
+    branches: [master, develop, v8]
 
 jobs:
   analyze:
diff --git a/.github/workflows/publish-preview.yml b/.github/workflows/publish-preview.yml
index 95e7c179..7722c47d 100644
--- a/.github/workflows/publish-preview.yml
+++ b/.github/workflows/publish-preview.yml
@@ -7,6 +7,7 @@ on:
     branches:
       - master
       - develop
+      - v8
     paths:
       - src/**
       - .github/workflows/**
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d93a0f7b..298a51e1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,6 +5,7 @@ on:
     branches:
       - master
       - develop
+      - v8 
     paths:
       - src/**
       - .github/workflows/**
diff --git a/src/GraphQLParser.ApiTests/GraphQLParser.approved.txt b/src/GraphQLParser.ApiTests/GraphQLParser.approved.txt
index 8d1a0de1..2154ddbe 100644
--- a/src/GraphQLParser.ApiTests/GraphQLParser.approved.txt
+++ b/src/GraphQLParser.ApiTests/GraphQLParser.approved.txt
@@ -211,6 +211,7 @@ namespace GraphQLParser.AST
     public class GraphQLEnumValue : GraphQLParser.AST.GraphQLValue, GraphQLParser.AST.INamedNode
     {
         public GraphQLEnumValue() { }
+        public GraphQLEnumValue(GraphQLParser.AST.GraphQLName name) { }
         public override GraphQLParser.AST.ASTNodeKind Kind { get; }
         public GraphQLParser.AST.GraphQLName Name { get; set; }
     }
@@ -240,6 +241,7 @@ namespace GraphQLParser.AST
     public class GraphQLField : GraphQLParser.AST.ASTNode, GraphQLParser.AST.IHasArgumentsNode, GraphQLParser.AST.IHasDirectivesNode, GraphQLParser.AST.IHasSelectionSetNode, GraphQLParser.AST.INamedNode, GraphQLParser.AST.ISelectionNode
     {
         public GraphQLField() { }
+        public GraphQLField(GraphQLParser.AST.GraphQLName name) { }
         public GraphQLParser.AST.GraphQLAlias? Alias { get; set; }
         public GraphQLParser.AST.GraphQLArguments? Arguments { get; set; }
         public GraphQLParser.AST.GraphQLDirectives? Directives { get; set; }
@@ -420,6 +422,7 @@ namespace GraphQLParser.AST
     public class GraphQLObjectField : GraphQLParser.AST.ASTNode, GraphQLParser.AST.INamedNode
     {
         public GraphQLObjectField() { }
+        public GraphQLObjectField(GraphQLParser.AST.GraphQLName name, GraphQLParser.AST.GraphQLValue value) { }
         public override GraphQLParser.AST.ASTNodeKind Kind { get; }
         public GraphQLParser.AST.GraphQLName Name { get; set; }
         public GraphQLParser.AST.GraphQLValue Value { get; set; }
@@ -427,6 +430,7 @@ namespace GraphQLParser.AST
     public class GraphQLObjectTypeDefinition : GraphQLParser.AST.GraphQLTypeDefinition, GraphQLParser.AST.IHasDirectivesNode, GraphQLParser.AST.IHasFieldsDefinitionNode, GraphQLParser.AST.IHasInterfacesNode
     {
         public GraphQLObjectTypeDefinition() { }
+        public GraphQLObjectTypeDefinition(GraphQLParser.AST.GraphQLName name) { }
         public GraphQLParser.AST.GraphQLDirectives? Directives { get; set; }
         public GraphQLParser.AST.GraphQLFieldsDefinition? Fields { get; set; }
         public GraphQLParser.AST.GraphQLImplementsInterfaces? Interfaces { get; set; }
@@ -492,6 +496,7 @@ namespace GraphQLParser.AST
     public class GraphQLSelectionSet : GraphQLParser.AST.ASTNode
     {
         public GraphQLSelectionSet() { }
+        public GraphQLSelectionSet(System.Collections.Generic.List<GraphQLParser.AST.ASTNode> selections) { }
         public override GraphQLParser.AST.ASTNodeKind Kind { get; }
         public System.Collections.Generic.List<GraphQLParser.AST.ASTNode> Selections { get; set; }
     }
@@ -520,6 +525,7 @@ namespace GraphQLParser.AST
     public abstract class GraphQLTypeDefinition : GraphQLParser.AST.ASTNode, GraphQLParser.AST.IHasDescriptionNode, GraphQLParser.AST.INamedNode
     {
         protected GraphQLTypeDefinition() { }
+        protected GraphQLTypeDefinition(GraphQLParser.AST.GraphQLName name) { }
         public GraphQLParser.AST.GraphQLDescription? Description { get; set; }
         public GraphQLParser.AST.GraphQLName Name { get; set; }
     }
diff --git a/src/GraphQLParser/AST/Definitions/GraphQLObjectTypeDefinition.cs b/src/GraphQLParser/AST/Definitions/GraphQLObjectTypeDefinition.cs
index 205ebd36..1f49e436 100644
--- a/src/GraphQLParser/AST/Definitions/GraphQLObjectTypeDefinition.cs
+++ b/src/GraphQLParser/AST/Definitions/GraphQLObjectTypeDefinition.cs
@@ -8,6 +8,21 @@ namespace GraphQLParser.AST;
 [DebuggerDisplay("GraphQLObjectTypeDefinition: {Name}")]
 public class GraphQLObjectTypeDefinition : GraphQLTypeDefinition, IHasDirectivesNode, IHasInterfacesNode, IHasFieldsDefinitionNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLObjectTypeDefinition"/>.
+    /// </summary>
+    public GraphQLObjectTypeDefinition()
+    {
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLObjectTypeDefinition"/>.
+    /// </summary>
+    public GraphQLObjectTypeDefinition(GraphQLName name)
+        : base(name)
+    {
+    }
+
     /// <inheritdoc/>
     public override ASTNodeKind Kind => ASTNodeKind.ObjectTypeDefinition;
 
diff --git a/src/GraphQLParser/AST/Definitions/GraphQLTypeDefinition.cs b/src/GraphQLParser/AST/Definitions/GraphQLTypeDefinition.cs
index 97a6f9c1..41fbaebe 100644
--- a/src/GraphQLParser/AST/Definitions/GraphQLTypeDefinition.cs
+++ b/src/GraphQLParser/AST/Definitions/GraphQLTypeDefinition.cs
@@ -5,9 +5,25 @@ namespace GraphQLParser.AST;
 /// </summary>
 public abstract class GraphQLTypeDefinition : ASTNode, INamedNode, IHasDescriptionNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLTypeDefinition"/>.
+    /// </summary>
+    protected GraphQLTypeDefinition()
+    {
+        Name = null!;
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLTypeDefinition"/>.
+    /// </summary>
+    protected GraphQLTypeDefinition(GraphQLName name)
+    {
+        Name = name;
+    }
+
     /// <inheritdoc/>
     public GraphQLDescription? Description { get; set; }
 
     /// <inheritdoc/>
-    public GraphQLName Name { get; set; } = null!;
+    public GraphQLName Name { get; set; }
 }
diff --git a/src/GraphQLParser/AST/GraphQLField.cs b/src/GraphQLParser/AST/GraphQLField.cs
index 795e7609..9e2ab5e6 100644
--- a/src/GraphQLParser/AST/GraphQLField.cs
+++ b/src/GraphQLParser/AST/GraphQLField.cs
@@ -5,6 +5,22 @@ namespace GraphQLParser.AST;
 /// </summary>
 public class GraphQLField : ASTNode, ISelectionNode, IHasSelectionSetNode, IHasDirectivesNode, IHasArgumentsNode, INamedNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLField"/>.
+    /// </summary>
+    public GraphQLField()
+    {
+        Name = null!;
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLField"/>.
+    /// </summary>
+    public GraphQLField(GraphQLName name)
+    {
+        Name = name;
+    }
+
     /// <inheritdoc/>
     public override ASTNodeKind Kind => ASTNodeKind.Field;
 
@@ -14,7 +30,7 @@ public class GraphQLField : ASTNode, ISelectionNode, IHasSelectionSetNode, IHasD
     public GraphQLAlias? Alias { get; set; }
 
     /// <inheritdoc/>
-    public GraphQLName Name { get; set; } = null!;
+    public GraphQLName Name { get; set; }
 
     /// <summary>
     /// Arguments for this field.
diff --git a/src/GraphQLParser/AST/GraphQLObjectField.cs b/src/GraphQLParser/AST/GraphQLObjectField.cs
index ca4b08a7..8d7dd671 100644
--- a/src/GraphQLParser/AST/GraphQLObjectField.cs
+++ b/src/GraphQLParser/AST/GraphQLObjectField.cs
@@ -5,16 +5,34 @@ namespace GraphQLParser.AST;
 /// </summary>
 public class GraphQLObjectField : ASTNode, INamedNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLObjectField"/>.
+    /// </summary>
+    public GraphQLObjectField()
+    {
+        Name = null!;
+        Value = null!;
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLObjectField"/>.
+    /// </summary>
+    public GraphQLObjectField(GraphQLName name, GraphQLValue value)
+    {
+        Name = name;
+        Value = value;
+    }
+
     /// <inheritdoc/>
     public override ASTNodeKind Kind => ASTNodeKind.ObjectField;
 
     /// <inheritdoc/>
-    public GraphQLName Name { get; set; } = null!;
+    public GraphQLName Name { get; set; }
 
     /// <summary>
     /// Value of the field represented as a nested AST node.
     /// </summary>
-    public GraphQLValue Value { get; set; } = null!;
+    public GraphQLValue Value { get; set; }
 }
 
 internal sealed class GraphQLObjectFieldWithLocation : GraphQLObjectField
diff --git a/src/GraphQLParser/AST/GraphQLSelectionSet.cs b/src/GraphQLParser/AST/GraphQLSelectionSet.cs
index efdf1536..a44444da 100644
--- a/src/GraphQLParser/AST/GraphQLSelectionSet.cs
+++ b/src/GraphQLParser/AST/GraphQLSelectionSet.cs
@@ -5,6 +5,22 @@ namespace GraphQLParser.AST;
 /// </summary>
 public class GraphQLSelectionSet : ASTNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLSelectionSet"/>.
+    /// </summary>
+    public GraphQLSelectionSet()
+    {
+        Selections = null!;
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLSelectionSet"/>.
+    /// </summary>
+    public GraphQLSelectionSet(List<ASTNode> selections)
+    {
+        Selections = selections;
+    }
+
     /// <inheritdoc/>
     public override ASTNodeKind Kind => ASTNodeKind.SelectionSet;
 
@@ -18,7 +34,7 @@ public class GraphQLSelectionSet : ASTNode
     /// <item><see cref="GraphQLInlineFragment"/></item>
     /// </list>
     /// </summary>
-    public List<ASTNode> Selections { get; set; } = null!;
+    public List<ASTNode> Selections { get; set; }
 }
 
 internal sealed class GraphQLSelectionSetWithLocation : GraphQLSelectionSet
diff --git a/src/GraphQLParser/AST/Values/GraphQLEnumValue.cs b/src/GraphQLParser/AST/Values/GraphQLEnumValue.cs
index 78a2a7e2..2e93ea84 100644
--- a/src/GraphQLParser/AST/Values/GraphQLEnumValue.cs
+++ b/src/GraphQLParser/AST/Values/GraphQLEnumValue.cs
@@ -8,11 +8,27 @@ namespace GraphQLParser.AST;
 [DebuggerDisplay("GraphQLEnumValue: {Name}")]
 public class GraphQLEnumValue : GraphQLValue, INamedNode
 {
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLEnumValue"/>.
+    /// </summary>
+    public GraphQLEnumValue()
+    {
+        Name = null!;
+    }
+
+    /// <summary>
+    /// Creates a new instance of <see cref="GraphQLEnumValue"/>.
+    /// </summary>
+    public GraphQLEnumValue(GraphQLName name)
+    {
+        Name = name;
+    }
+
     /// <inheritdoc/>
     public override ASTNodeKind Kind => ASTNodeKind.EnumValue;
 
     /// <inheritdoc/>
-    public GraphQLName Name { get; set; } = null!;
+    public GraphQLName Name { get; set; }
 }
 
 internal sealed class GraphQLEnumValueWithLocation : GraphQLEnumValue