added alignment

Instructions/Alignment.cs

@@ -0,0 +1,6 @@
+public enum Alignment
+{
+    Right,
+    Left,
+    Center
+}

Instructions/BarcodeInstruction.cs

@@ -14,6 +14,9 @@ public class BarcodeInstruction : BaseInstruction
 	[JsonConverter(typeof(JsonStringEnumConverter))]
 	public BarcodeCode barcodeCode { get; set; } = BarcodeCode.CODE_B;
 
+	[JsonConverter(typeof(JsonStringEnumConverter))]
+	public Alignment alignment {get; set; } = Alignment.Left;
+
 	// [JsonConverter(typeof(JsonStringEnumConverter))]
 	// public BarWidth width { get; set; } = BarWidth.Default;
 
@@ -29,6 +32,8 @@ public class BarcodeInstruction : BaseInstruction
 		// 	commands.Add(e.SetBarWidth(width));
 		// }
 
+		commands.Add(alignmentCommand(alignment));
+
 		if (height > 0)
 		{
 			commands.Add(e.SetBarcodeHeightInDots(height));

Instructions/BaseInstruction.cs

@@ -1,4 +1,5 @@
 using System.Runtime.Serialization;
+using ESCPOS_NET.Emitters;
 
 public abstract class BaseInstruction
 {
@@ -6,4 +7,19 @@ public abstract class BaseInstruction
 	public string? type { get; set; }
 
 	public abstract List<byte[]> GetInstructions();
+
+	protected byte[] alignmentCommand(Alignment alignment){
+		var e = new EPSON();
+		switch (alignment)
+		{
+			case Alignment.Center:
+				return e.CenterAlign();
+			case Alignment.Left:
+				return e.LeftAlign();
+			case Alignment.Right:
+				return e.RightAlign();
+			default:
+				return e.LeftAlign();
+		}
+	}
 }