Add Encoding.Utf8WithoutBom static extension property

PowerKit.Tests/EncodingExtensionsTests.cs

@@ -0,0 +1,22 @@
+using System.Text;
+using FluentAssertions;
+using PowerKit.Extensions;
+using Xunit;
+
+namespace PowerKit.Tests;
+
+public class EncodingExtensionsTests
+{
+    [Fact]
+    public void Utf8WithoutBom_Test()
+    {
+        // Arrange
+        var text = "hello, world! 🌍";
+
+        // Act
+        var bytes = Encoding.Utf8WithoutBom.GetBytes(text);
+
+        // Assert
+        Encoding.UTF8.GetString(bytes).Should().Be(text);
+    }
+}

PowerKit/Extensions/EncodingExtensions.cs

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+using System.Text;
+
+namespace PowerKit.Extensions;
+
+file static class EncodingEx
+{
+    public static Encoding Utf8WithoutBom { get; } = new UTF8Encoding(false);
+}
+
+internal static class EncodingExtensions
+{
+    extension(Encoding)
+    {
+        /// <summary>
+        /// Gets an instance of the UTF-8 encoding that does not emit a byte order mark (BOM).
+        /// </summary>
+        public static Encoding Utf8WithoutBom => EncodingEx.Utf8WithoutBom;
+    }
+}