Handle :get/:set in EditorRequired checking

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/IntegrationTests/ComponentCodeGenerationTestBase.cs

@@ -1198,6 +1198,96 @@ public class ComponentWithEditorRequiredParameters : ComponentBase
         Assert.Empty(generated.RazorDiagnostics);
     }
 
+    [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/10553")]
+    public void Component_WithEditorRequiredParameter_ValueSpecifiedUsingBindGetSet()
+    {
+        AdditionalSyntaxTrees.Add(Parse("""
+            using System;
+            using Microsoft.AspNetCore.Components;
+
+            namespace Test;
+
+            public class ComponentWithEditorRequiredParameters : ComponentBase
+            {
+                [Parameter]
+                [EditorRequired]
+                public string Property1 { get; set; }
+            }
+            """));
+
+        var generated = CompileToCSharp("""
+            <ComponentWithEditorRequiredParameters @bind-Property1:get="myField" @bind-Property1:set="OnFieldChanged" />
+
+            @code {
+                private string myField = "Some Value";
+                private void OnFieldChanged(string value) { }
+            }
+            """);
+
+        CompileToAssembly(generated);
+        Assert.Empty(generated.RazorDiagnostics);
+    }
+
+    [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/10553")]
+    public void Component_WithEditorRequiredParameter_ValueSpecifiedUsingBindGet()
+    {
+        AdditionalSyntaxTrees.Add(Parse("""
+            using System;
+            using Microsoft.AspNetCore.Components;
+
+            namespace Test;
+
+            public class ComponentWithEditorRequiredParameters : ComponentBase
+            {
+                [Parameter]
+                [EditorRequired]
+                public string Property1 { get; set; }
+            }
+            """));
+
+        var generated = CompileToCSharp("""
+            <ComponentWithEditorRequiredParameters @bind-Property1:get="myField" />
+
+            @code {
+                private string myField = "Some Value";
+            }
+            """);
+
+        CompileToAssembly(generated);
+        Assert.Empty(generated.RazorDiagnostics);
+    }
+
+    [IntegrationTestFact, WorkItem("https://github.com/dotnet/razor/issues/10553")]
+    public void Component_WithEditorRequiredParameter_ValueSpecifiedUsingBindSet()
+    {
+        AdditionalSyntaxTrees.Add(Parse("""
+            using System;
+            using Microsoft.AspNetCore.Components;
+
+            namespace Test;
+
+            public class ComponentWithEditorRequiredParameters : ComponentBase
+            {
+                [Parameter]
+                [EditorRequired]
+                public string Property1 { get; set; }
+            }
+            """));
+
+        var generated = CompileToCSharp("""
+            <ComponentWithEditorRequiredParameters @bind-Property1:set="OnFieldChanged" />
+
+            @code {
+                private void OnFieldChanged(string value) { }
+            }
+            """);
+
+        var compiled = CompileToAssembly(generated);
+        generated.RazorDiagnostics.Verify(
+            // x:\dir\subdir\Test\TestComponent.cshtml(1,61): error RZ10016: Attribute 'bind-Property1:set' was used but no attribute 'bind-Property1:get' was found.
+            Diagnostic("RZ10016").WithLocation(1, 61));
+    }
+
     [IntegrationTestFact]
     public void Component_WithEditorRequiredChildContent_NoValueSpecified()
     {

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/Components/ComponentLoweringPass.cs

@@ -203,10 +203,17 @@ static bool IsPresentAsAttribute(string attributeName, ComponentIntermediateNode
                 const string bindPrefix = "@bind-";
                 if (child is TagHelperDirectiveAttributeIntermediateNode { OriginalAttributeName: { } originalAttributeName } &&
                     originalAttributeName.StartsWith(bindPrefix, StringComparison.Ordinal) &&
-                    originalAttributeName.AsSpan()[bindPrefix.Length..].Equals(attributeName.AsSpan(), StringComparison.Ordinal))
+                    originalAttributeName.AsSpan(start: bindPrefix.Length).Equals(attributeName.AsSpan(), StringComparison.Ordinal))
                 {
                     return true;
                 }
+                if (child is TagHelperDirectiveAttributeParameterIntermediateNode { OriginalAttributeName: { } originalName, AttributeNameWithoutParameter: { } nameWithoutParameter } &&
+                    originalName.StartsWith(bindPrefix, StringComparison.Ordinal) &&
+                    nameWithoutParameter.AsSpan(start: bindPrefix.Length - 1).Equals(attributeName.AsSpan(), StringComparison.Ordinal))
+                {
+                    // `@bind-Value:get` or `@bind-Value:set` is specified.
+                    return true;
+                }
             }
 
             return false;

src/Shared/Microsoft.AspNetCore.Razor.Test.Common/DiagnosticExtensions.cs

@@ -0,0 +1,20 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Razor.Language;
+using Microsoft.CodeAnalysis.Test.Utilities;
+using Microsoft.NET.Sdk.Razor.SourceGenerators;
+
+namespace Microsoft.CodeAnalysis;
+
+public static class RazorDiagnosticExtensions
+{
+    public static void Verify(
+        this IEnumerable<RazorDiagnostic> diagnostics,
+        params DiagnosticDescription[] expected)
+    {
+        diagnostics.Select(d => d.AsDiagnostic()).Verify(expected);
+    }
+}