diff --git a/dotnet/src/webdriver/BiDi/Modules/Script/LocalValue.cs b/dotnet/src/webdriver/BiDi/Modules/Script/LocalValue.cs
index 19be05efaaf18..2e458c0377920 100644
--- a/dotnet/src/webdriver/BiDi/Modules/Script/LocalValue.cs
+++ b/dotnet/src/webdriver/BiDi/Modules/Script/LocalValue.cs
@@ -18,10 +18,12 @@
 // </copyright>
 
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
 using System.Text.Json.Serialization;
+using System.Text.RegularExpressions;
 
 namespace OpenQA.Selenium.BiDi.Modules.Script;
 
@@ -41,10 +43,11 @@ namespace OpenQA.Selenium.BiDi.Modules.Script;
 [JsonDerivedType(typeof(SetLocalValue), "set")]
 public abstract record LocalValue
 {
-    public static implicit operator LocalValue(bool? value) { return value is bool b ? new BooleanLocalValue(b) : new NullLocalValue(); }
-    public static implicit operator LocalValue(int? value) { return value is int i ? new NumberLocalValue(i) : new NullLocalValue(); }
-    public static implicit operator LocalValue(double? value) { return value is double d ? new NumberLocalValue(d) : new NullLocalValue(); }
-    public static implicit operator LocalValue(string? value) { return value is null ? new NullLocalValue() : new StringLocalValue(value); }
+    public static implicit operator LocalValue(bool? value) { return ConvertFrom(value); }
+    public static implicit operator LocalValue(int? value) { return ConvertFrom(value); }
+    public static implicit operator LocalValue(double? value) { return ConvertFrom(value); }
+    public static implicit operator LocalValue(string? value) { return ConvertFrom(value); }
+    public static implicit operator LocalValue(DateTimeOffset? value) { return ConvertFrom(value); }
 
     // TODO: Extend converting from types
     public static LocalValue ConvertFrom(object? value)
@@ -58,86 +61,222 @@ public static LocalValue ConvertFrom(object? value)
                 return new NullLocalValue();
 
             case bool b:
-                return new BooleanLocalValue(b);
+                return ConvertFrom(b);
 
             case int i:
-                return new NumberLocalValue(i);
+                return ConvertFrom(i);
 
             case double d:
-                return new NumberLocalValue(d);
+                return ConvertFrom(d);
 
             case long l:
-                return new NumberLocalValue(l);
+                return ConvertFrom(l);
 
-            case DateTime dt:
-                return new DateLocalValue(dt.ToString("o"));
+            case DateTimeOffset dt:
+                return ConvertFrom(dt);
 
             case BigInteger bigInt:
-                return new BigIntLocalValue(bigInt.ToString());
+                return ConvertFrom(bigInt);
 
             case string str:
-                return new StringLocalValue(str);
+                return ConvertFrom(str);
 
-            case IDictionary<string, string?> dictionary:
+            case Regex regex:
+                return ConvertFrom(regex);
+
+            case { } when value.GetType().GetInterfaces()
+                .Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(ISet<>)):
                 {
-                    var bidiObject = new List<List<LocalValue>>(dictionary.Count);
-                    foreach (var item in dictionary)
-                    {
-                        bidiObject.Add([new StringLocalValue(item.Key), ConvertFrom(item.Value)]);
-                    }
+                    IEnumerable set = (IEnumerable)value;
 
-                    return new ObjectLocalValue(bidiObject);
-                }
+                    List<LocalValue> setValues = [];
 
-            case IDictionary<string, object?> dictionary:
-                {
-                    var bidiObject = new List<List<LocalValue>>(dictionary.Count);
-                    foreach (var item in dictionary)
+                    foreach (var obj in set)
                     {
-                        bidiObject.Add([new StringLocalValue(item.Key), ConvertFrom(item.Value)]);
+                        setValues.Add(ConvertFrom(obj));
                     }
 
-                    return new ObjectLocalValue(bidiObject);
+                    return new SetLocalValue(setValues);
                 }
 
-            case IDictionary<int, object?> dictionary:
-                {
-                    var bidiObject = new List<List<LocalValue>>(dictionary.Count);
-                    foreach (var item in dictionary)
-                    {
-                        bidiObject.Add([ConvertFrom(item.Key), ConvertFrom(item.Value)]);
-                    }
+            case IDictionary dictionary:
+                return ConvertFrom(dictionary);
 
-                    return new MapLocalValue(bidiObject);
-                }
+            case IEnumerable enumerable:
+                return ConvertFrom(enumerable);
 
-            case IEnumerable<object?> list:
-                return new ArrayLocalValue(list.Select(ConvertFrom).ToList());
+            default:
+                return ReflectionBasedConvertFrom(value);
+        }
+    }
 
-            case object:
-                {
-                    const System.Reflection.BindingFlags Flags = System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance;
+    public static LocalValue ConvertFrom(bool? value)
+    {
+        if (value is bool b)
+        {
+            return new BooleanLocalValue(b);
+        }
 
-                    var properties = value.GetType().GetProperties(Flags);
+        return new NullLocalValue();
+    }
 
-                    var values = new List<List<LocalValue>>(properties.Length);
-                    foreach (var property in properties)
-                    {
-                        object? propertyValue;
-                        try
-                        {
-                            propertyValue = property.GetValue(value);
-                        }
-                        catch (Exception ex)
-                        {
-                            throw new BiDiException($"Could not retrieve property {property.Name} from {property.DeclaringType}", ex);
-                        }
-                        values.Add([property.Name, ConvertFrom(propertyValue)]);
-                    }
+    public static LocalValue ConvertFrom(int? value)
+    {
+        if (value is int b)
+        {
+            return new NumberLocalValue(b);
+        }
 
-                    return new ObjectLocalValue(values);
-                }
+        return new NullLocalValue();
+    }
+
+    public static LocalValue ConvertFrom(double? value)
+    {
+        if (value is double b)
+        {
+            return new NumberLocalValue(b);
+        }
+
+        return new NullLocalValue();
+    }
+
+    public static LocalValue ConvertFrom(long? value)
+    {
+        if (value is long b)
+        {
+            return new NumberLocalValue(b);
+        }
+
+        return new NullLocalValue();
+    }
+
+    public static LocalValue ConvertFrom(string? value)
+    {
+        if (value is not null)
+        {
+            return new StringLocalValue(value);
+        }
+
+        return new NullLocalValue();
+    }
+
+    /// <summary>
+    /// Converts a .NET Regex into a BiDi Regex
+    /// </summary>
+    /// <param name="regex">A .NET Regex.</param>
+    /// <returns>A BiDi Regex.</returns>
+    /// <remarks>
+    /// Note that the .NET regular expression engine does not work the same as the JavaScript engine.
+    /// To minimize the differences between the two engines, it is recommended to enabled the <see cref="RegexOptions.ECMAScript"/> option.
+    /// </remarks>
+    public static LocalValue ConvertFrom(Regex? regex)
+    {
+        if (regex is null)
+        {
+            return new NullLocalValue();
         }
+
+        string? flags = RegExpValue.GetRegExpFlags(regex.Options);
+
+        return new RegExpLocalValue(new RegExpValue(regex.ToString()) { Flags = flags });
+    }
+
+    public static LocalValue ConvertFrom(DateTimeOffset? value)
+    {
+        if (value is null)
+        {
+            return new NullLocalValue();
+        }
+
+        return new DateLocalValue(value.Value.ToString("o"));
+    }
+
+    public static LocalValue ConvertFrom(BigInteger? value)
+    {
+        if (value is not null)
+        {
+            return new BigIntLocalValue(value.Value.ToString());
+        }
+
+        return new NullLocalValue();
+    }
+
+    public static LocalValue ConvertFrom(IEnumerable? value)
+    {
+        if (value is null)
+        {
+            return new NullLocalValue();
+        }
+
+        List<LocalValue> list = [];
+
+        foreach (var element in value)
+        {
+            list.Add(ConvertFrom(element));
+        }
+
+        return new ArrayLocalValue(list);
+    }
+
+    public static LocalValue ConvertFrom(IDictionary? value)
+    {
+        if (value is null)
+        {
+            return new NullLocalValue();
+        }
+
+        var bidiObject = new List<List<LocalValue>>(value.Count);
+
+        foreach (var key in value.Keys)
+        {
+            bidiObject.Add([ConvertFrom(key), ConvertFrom(value[key])]);
+        }
+
+        return new MapLocalValue(bidiObject);
+    }
+
+    public static LocalValue ConvertFrom<T>(ISet<T?>? value)
+    {
+        if (value is null)
+        {
+            return new NullLocalValue();
+        }
+
+        LocalValue[] convertedValues = [.. value.Select(x => ConvertFrom(x))];
+
+        return new SetLocalValue(convertedValues);
+    }
+
+    private static LocalValue ReflectionBasedConvertFrom(object? value)
+    {
+        if (value is null)
+        {
+            return new NullLocalValue();
+        }
+
+        const System.Reflection.BindingFlags Flags = System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance;
+
+        System.Reflection.PropertyInfo[] properties = value.GetType().GetProperties(Flags);
+
+        var values = new List<List<LocalValue>>(properties.Length);
+
+        foreach (System.Reflection.PropertyInfo? property in properties)
+        {
+            object? propertyValue;
+
+            try
+            {
+                propertyValue = property.GetValue(value);
+            }
+            catch (Exception ex)
+            {
+                throw new BiDiException($"Could not retrieve property {property.Name} from {property.DeclaringType}", ex);
+            }
+
+            values.Add([property.Name, ConvertFrom(propertyValue)]);
+        }
+
+        return new ObjectLocalValue(values);
     }
 }
 
diff --git a/dotnet/src/webdriver/BiDi/Modules/Script/RegExpValue.cs b/dotnet/src/webdriver/BiDi/Modules/Script/RegExpValue.cs
index 47a2239ab093d..eb25c091e8f91 100644
--- a/dotnet/src/webdriver/BiDi/Modules/Script/RegExpValue.cs
+++ b/dotnet/src/webdriver/BiDi/Modules/Script/RegExpValue.cs
@@ -17,9 +17,62 @@
 // under the License.
 // </copyright>
 
+using System;
+using System.Diagnostics;
+using System.Text.RegularExpressions;
+
 namespace OpenQA.Selenium.BiDi.Modules.Script;
 
 public record RegExpValue(string Pattern)
 {
     public string? Flags { get; set; }
+
+    internal static string? GetRegExpFlags(RegexOptions options)
+    {
+        if (options == RegexOptions.None)
+        {
+            return null;
+        }
+
+        string flags = string.Empty;
+        const RegexOptions NonBacktracking = (RegexOptions)1024;
+#if NET8_0_OR_GREATER
+        Debug.Assert(NonBacktracking == RegexOptions.NonBacktracking);
+#endif
+        const RegexOptions NonApplicableOptions = RegexOptions.Compiled | NonBacktracking;
+
+        const RegexOptions UnsupportedOptions =
+            RegexOptions.ExplicitCapture |
+            RegexOptions.IgnorePatternWhitespace |
+            RegexOptions.RightToLeft |
+            RegexOptions.CultureInvariant;
+
+        options &= ~NonApplicableOptions;
+        if ((options & UnsupportedOptions) != 0)
+        {
+            throw new NotSupportedException($"The selected RegEx options are not supported in BiDi: {options & UnsupportedOptions}");
+        }
+
+        if ((options & RegexOptions.IgnoreCase) != 0)
+        {
+            flags += "i";
+            options = options & ~RegexOptions.IgnoreCase;
+        }
+
+        if ((options & RegexOptions.Multiline) != 0)
+        {
+            options = options & ~RegexOptions.Multiline;
+            flags += "m";
+        }
+
+        if ((options & RegexOptions.Singleline) != 0)
+        {
+            options = options & ~RegexOptions.Singleline;
+            flags += "s";
+        }
+
+        Debug.Assert(options == RegexOptions.None);
+
+        return flags;
+    }
 }
diff --git a/dotnet/test/common/BiDi/Script/LocalValueConversionTests.cs b/dotnet/test/common/BiDi/Script/LocalValueConversionTests.cs
index c0a1058a55ef5..0ef090b7a0bcd 100644
--- a/dotnet/test/common/BiDi/Script/LocalValueConversionTests.cs
+++ b/dotnet/test/common/BiDi/Script/LocalValueConversionTests.cs
@@ -19,6 +19,10 @@
 
 using NUnit.Framework;
 using OpenQA.Selenium.BiDi.Modules.Script;
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
 
 namespace OpenQA.Selenium.BiDi.Script;
 
@@ -28,72 +32,211 @@ class LocalValueConversionTests
     public void CanConvertNullBoolToLocalValue()
     {
         bool? arg = null;
-        LocalValue result = arg;
-        Assert.That(result, Is.TypeOf<NullLocalValue>());
+
+        AssertValue(arg);
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NullLocalValue>());
+        }
     }
 
     [Test]
     public void CanConvertTrueToLocalValue()
     {
-        LocalValue result = true;
-        Assert.That(result, Is.TypeOf<BooleanLocalValue>());
-        Assert.That((result as BooleanLocalValue).Value, Is.True);
+        AssertValue(true);
+
+        AssertValue(LocalValue.ConvertFrom(true));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<BooleanLocalValue>());
+            Assert.That((value as BooleanLocalValue).Value, Is.True);
+        }
     }
 
     [Test]
     public void CanConvertFalseToLocalValue()
     {
-        LocalValue result = false;
-        Assert.That(result, Is.TypeOf<BooleanLocalValue>());
-        Assert.That((result as BooleanLocalValue).Value, Is.False);
+        AssertValue(false);
+
+        AssertValue(LocalValue.ConvertFrom(false));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<BooleanLocalValue>());
+            Assert.That((value as BooleanLocalValue).Value, Is.False);
+        }
     }
 
     [Test]
     public void CanConvertNullIntToLocalValue()
     {
         int? arg = null;
-        LocalValue result = arg;
-        Assert.That(result, Is.TypeOf<NullLocalValue>());
+
+        AssertValue(arg);
+
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NullLocalValue>());
+        }
     }
 
     [Test]
     public void CanConvertZeroIntToLocalValue()
     {
-        LocalValue result = 0;
-        Assert.That(result, Is.TypeOf<NumberLocalValue>());
-        Assert.That((result as NumberLocalValue).Value, Is.Zero);
+        int arg = 0;
+
+        AssertValue(arg);
+
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NumberLocalValue>());
+            Assert.That((value as NumberLocalValue).Value, Is.Zero);
+        }
     }
 
     [Test]
     public void CanConvertNullDoubleToLocalValue()
     {
         double? arg = null;
-        LocalValue result = arg;
-        Assert.That(result, Is.TypeOf<NullLocalValue>());
+
+        AssertValue(arg);
+
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NullLocalValue>());
+        }
     }
 
     [Test]
     public void CanConvertZeroDoubleToLocalValue()
     {
         double arg = 0;
-        LocalValue result = arg;
-        Assert.That(result, Is.TypeOf<NumberLocalValue>());
-        Assert.That((result as NumberLocalValue).Value, Is.Zero);
+
+        AssertValue(arg);
+
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NumberLocalValue>());
+            Assert.That((value as NumberLocalValue).Value, Is.Zero);
+        }
     }
 
     [Test]
     public void CanConvertNullStringToLocalValue()
     {
         string arg = null;
-        LocalValue result = arg;
-        Assert.That(result, Is.TypeOf<NullLocalValue>());
+
+        AssertValue(arg);
+
+        AssertValue(LocalValue.ConvertFrom(arg));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<NullLocalValue>());
+        }
     }
 
     [Test]
     public void CanConvertStringToLocalValue()
     {
-        LocalValue result = "value";
-        Assert.That(result, Is.TypeOf<StringLocalValue>());
-        Assert.That((result as StringLocalValue).Value, Is.EqualTo("value"));
+        AssertValue("value");
+
+        AssertValue(LocalValue.ConvertFrom("value"));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<StringLocalValue>());
+            Assert.That((value as StringLocalValue).Value, Is.EqualTo("value"));
+        }
+    }
+
+    [Test]
+    public void CanConvertDateTimeOffsetToLocalValue()
+    {
+        var date = new DateTimeOffset(2025, 4, 13, 5, 40, 20, 123, 456, TimeSpan.FromHours(+3));
+
+        AssertValue(date);
+
+        AssertValue(LocalValue.ConvertFrom(date));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<DateLocalValue>());
+            Assert.That((value as DateLocalValue).Value, Is.EqualTo("2025-04-13T05:40:20.1234560+03:00"));
+        }
+    }
+
+    [Test]
+    public void CanConvertArrayToLocalValue()
+    {
+        AssertValue(LocalValue.ConvertFrom(new List<int> { 1, 2 }));
+
+        AssertValue(LocalValue.ConvertFrom(new string[] { "a", "b" }));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<ArrayLocalValue>());
+            Assert.That((value as ArrayLocalValue).Value.Count, Is.EqualTo(2));
+        }
+    }
+
+    [Test]
+    public void CanConvertMapToLocalValue()
+    {
+        AssertValue(LocalValue.ConvertFrom(new Dictionary<int, string> { { 1, "a" }, { 2, "b" } }));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<MapLocalValue>());
+            Assert.That((value as MapLocalValue).Value.Count, Is.EqualTo(2));
+        }
+    }
+
+    [Test]
+    public void CanConvertSetToLocalValue()
+    {
+        AssertValue(LocalValue.ConvertFrom(new HashSet<int> { 1, 2 }));
+
+        AssertValue(LocalValue.ConvertFrom(ImmutableHashSet.CreateRange([1, 2])));
+
+        static void AssertValue(LocalValue value)
+        {
+            Assert.That(value, Is.TypeOf<SetLocalValue>());
+            Assert.That((value as SetLocalValue).Value.Count, Is.EqualTo(2));
+        }
+    }
+
+    [Test]
+    public void CanConvertObjectValue()
+    {
+        var arg = new
+        {
+            UIntNumber = 5u,
+            Array = new int[] { 1, 2 },
+            List = new List<string> { "a", "b" },
+            Dictionary = new Dictionary<string, object> { { "a", 1 }, { "b", 2 } },
+            Set = new HashSet<string> { "a", "b" }
+        };
+
+        var value = LocalValue.ConvertFrom(arg);
+
+        Console.WriteLine(value);
+
+        Assert.That(value, Is.TypeOf<ObjectLocalValue>());
+
+        var objValue = value as ObjectLocalValue;
+
+        Assert.That(objValue.Value, Has.Exactly(5).Count);
     }
 }