Fix mistake in array index

src/Microsoft.AspNetCore.Blazor.Razor.Extensions/BindLoweringPass.cs

@@ -281,7 +281,7 @@ namespace Microsoft.AspNetCore.Blazor.Razor
             var segments = attributeName.Split('-');
             for (var i = 0; i < segments.Length; i++)
             {
-                if (string.IsNullOrEmpty(segments[0]))
+                if (string.IsNullOrEmpty(segments[i]))
                 {
                     return false;
                 }

test/Microsoft.AspNetCore.Blazor.Build.Test/BindRazorIntegrationTest.cs

@@ -486,5 +486,26 @@ namespace Test
                 frame => AssertFrame.Whitespace(frame, 6),
                 frame => AssertFrame.Whitespace(frame, 7));
         }
+
+        [Fact]
+        public void Render_Bind_With_IncorrectAttributeNames()
+        {
+            //more than 3 parts
+            Assert.Throws<InvalidOperationException>(() => CompileToComponent(@"
+@addTagHelper *, TestAssembly
+<input type=""text"" bind-first-second-third=""Text"" />
+@functions {
+    public string Text { get; set; } = ""text"";
+}"));
+
+            //ends with '-'
+            Assert.Throws<InvalidOperationException>(() => CompileToComponent(@"
+@addTagHelper *, TestAssembly
+<input type=""text"" bind-first-=""Text"" />
+@functions {
+    public string Text { get; set; } = ""text"";
+}"));
+
+        }
     }
 }