add HttpMethod.Query

src/libraries/System.Net.Http/ref/System.Net.Http.cs

@@ -243,6 +243,7 @@ public HttpMethod(string method) { }
         public static System.Net.Http.HttpMethod Patch { get { throw null; } }
         public static System.Net.Http.HttpMethod Post { get { throw null; } }
         public static System.Net.Http.HttpMethod Put { get { throw null; } }
+        public static System.Net.Http.HttpMethod Query { get { throw null; } }
         public static System.Net.Http.HttpMethod Trace { get { throw null; } }
         public bool Equals([System.Diagnostics.CodeAnalysis.NotNullWhenAttribute(true)] System.Net.Http.HttpMethod? other) { throw null; }
         public override bool Equals([System.Diagnostics.CodeAnalysis.NotNullWhenAttribute(true)] object? obj) { throw null; }

src/libraries/System.Net.Http/src/System/Net/Http/HttpMethod.cs

@@ -20,6 +20,10 @@ public partial class HttpMethod : IEquatable<HttpMethod>
         public static HttpMethod Trace { get; } = new("TRACE", http3StaticTableIndex: -1);
         public static HttpMethod Patch { get; } = new("PATCH", http3StaticTableIndex: -1);
 
+        /// <summary>Gets the HTTP QUERY protocol method.</summary>
+        /// <value>The HTTP QUERY method.</value>
+        public static HttpMethod Query { get; } = new("QUERY", http3StaticTableIndex: -1);
+
         /// <summary>Gets the HTTP CONNECT protocol method.</summary>
         /// <value>The HTTP CONNECT method.</value>
         public static HttpMethod Connect { get; } = new("CONNECT", H3StaticTable.MethodConnect);
@@ -106,6 +110,7 @@ public static HttpMethod Parse(ReadOnlySpan<char> method) =>
                         4 => Post,
                         _ => Patch,
                     },
+                    'q' => Query,
                     't' => Trace,
                     _ => null,
                 };

src/libraries/System.Net.Http/tests/FunctionalTests/HttpMethodTest.cs

@@ -37,6 +37,7 @@ public void StaticProperties_VerifyValues_PropertyNameMatchesHttpMethodName()
             Assert.Equal("HEAD", HttpMethod.Head.Method);
             Assert.Equal("OPTIONS", HttpMethod.Options.Method);
             Assert.Equal("TRACE", HttpMethod.Trace.Method);
+            Assert.Equal("QUERY", HttpMethod.Query.Method);
         }
 
         [Fact]
@@ -160,6 +161,7 @@ public static IEnumerable<object[]> Parse_UsesKnownInstances_MemberData()
             yield return new object[] { HttpMethod.Patch, nameof(HttpMethod.Patch) };
             yield return new object[] { HttpMethod.Post, nameof(HttpMethod.Post) };
             yield return new object[] { HttpMethod.Put, nameof(HttpMethod.Put) };
+            yield return new object[] { HttpMethod.Query, nameof(HttpMethod.Query) };
             yield return new object[] { HttpMethod.Trace, nameof(HttpMethod.Trace) };
         }