Add IsEmpty

Author: Joy-less

src/LinkDotNet.StringBuilder/ValueStringBuilder.cs

@@ -1,4 +1,4 @@
-using System.Buffers;
+using System.Buffers;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -85,6 +85,18 @@ public readonly int Capacity
         get => buffer.Length;
     }
 
+    /// <summary>
+    /// Gets a value indicating whether the builder's length is 0.
+    /// </summary>
+    /// <value>
+    /// <see langword="true"/> if the builder is empty; otherwise, <see langword="false"/>.
+    /// </value>
+    public readonly bool IsEmpty
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        get => Length == 0;
+    }
+
     /// <summary>
     /// Returns the character at the given index or throws an <see cref="IndexOutOfRangeException"/> if the index is bigger than the string.
     /// </summary>