make DocumentSignatureType an extensible enum (Azure#24565)

Author: maririos

sdk/formrecognizer/Azure.AI.FormRecognizer/api/Azure.AI.FormRecognizer.netstandard2.0.cs

@@ -537,10 +537,23 @@ internal DocumentSelectionMark() { }
         public Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSpan Span { get { throw null; } }
         public Azure.AI.FormRecognizer.DocumentAnalysis.SelectionMarkState State { get { throw null; } }
     }
-    public enum DocumentSignatureType
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public readonly partial struct DocumentSignatureType : System.IEquatable<Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType>
     {
-        Signed = 0,
-        Unsigned = 1,
+        private readonly object _dummy;
+        private readonly int _dummyPrimitive;
+        public DocumentSignatureType(string value) { throw null; }
+        public static Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType Signed { get { throw null; } }
+        public static Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType Unsigned { get { throw null; } }
+        public bool Equals(Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType other) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public override bool Equals(object obj) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType left, Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType right) { throw null; }
+        public static implicit operator Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType (string value) { throw null; }
+        public static bool operator !=(Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType left, Azure.AI.FormRecognizer.DocumentAnalysis.DocumentSignatureType right) { throw null; }
+        public override string ToString() { throw null; }
     }
     public partial class DocumentSpan
     {

sdk/formrecognizer/Azure.AI.FormRecognizer/src/DocumentSignatureType.cs

@@ -8,18 +8,8 @@ namespace Azure.AI.FormRecognizer.DocumentAnalysis
     /// <summary>
     /// The presence of a signature.
     /// </summary>
-    [System.Diagnostics.CodeAnalysis.SuppressMessage("Naming", "CA1720:Identifier contains type name")]
     [CodeGenModel("DocumentSignatureType")]
-    public enum DocumentSignatureType
+    public partial struct DocumentSignatureType
     {
-        /// <summary>
-        /// Signed.
-        /// </summary>
-        Signed,
-
-        /// <summary>
-        /// Unsigned.
-        /// </summary>
-        Unsigned
     }
 }