diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpContentHeaders.cs b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpContentHeaders.cs
index bae8addd668fec..361e27bd8f0596 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpContentHeaders.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpContentHeaders.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Collections.Generic;
-using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
 
 namespace System.Net.Http.Headers
 {
@@ -16,17 +14,8 @@ public sealed class HttpContentHeaders : HttpHeaders
         private HttpHeaderValueCollection<string>? _contentEncoding;
         private HttpHeaderValueCollection<string>? _contentLanguage;
 
-        public ICollection<string> Allow
-        {
-            get
-            {
-                if (_allow == null)
-                {
-                    _allow = new HttpHeaderValueCollection<string>(KnownHeaders.Allow.Descriptor, this);
-                }
-                return _allow;
-            }
-        }
+        public ICollection<string> Allow =>
+            _allow ??= new HttpHeaderValueCollection<string>(KnownHeaders.Allow.Descriptor, this);
 
         public ContentDispositionHeaderValue? ContentDisposition
         {
@@ -36,29 +25,11 @@ public ContentDispositionHeaderValue? ContentDisposition
 
         // Must be a collection (and not provide properties like "GZip", "Deflate", etc.) since the
         // order matters!
-        public ICollection<string> ContentEncoding
-        {
-            get
-            {
-                if (_contentEncoding == null)
-                {
-                    _contentEncoding = new HttpHeaderValueCollection<string>(KnownHeaders.ContentEncoding.Descriptor, this);
-                }
-                return _contentEncoding;
-            }
-        }
+        public ICollection<string> ContentEncoding =>
+            _contentEncoding ??= new HttpHeaderValueCollection<string>(KnownHeaders.ContentEncoding.Descriptor, this);
 
-        public ICollection<string> ContentLanguage
-        {
-            get
-            {
-                if (_contentLanguage == null)
-                {
-                    _contentLanguage = new HttpHeaderValueCollection<string>(KnownHeaders.ContentLanguage.Descriptor, this);
-                }
-                return _contentLanguage;
-            }
-        }
+        public ICollection<string> ContentLanguage =>
+            _contentLanguage ??= new HttpHeaderValueCollection<string>(KnownHeaders.ContentLanguage.Descriptor, this);
 
         public long? ContentLength
         {
diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpGeneralHeaders.cs b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpGeneralHeaders.cs
index b5fae3e1eec5ea..4bd4694f4d5d3d 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpGeneralHeaders.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpGeneralHeaders.cs
@@ -1,7 +1,6 @@
 // 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.Diagnostics;
 
 namespace System.Net.Http.Headers
@@ -74,29 +73,11 @@ public DateTimeOffset? Date
             set { _parent.SetOrRemoveParsedValue(KnownHeaders.Date.Descriptor, value); }
         }
 
-        public HttpHeaderValueCollection<NameValueHeaderValue> Pragma
-        {
-            get
-            {
-                if (_pragma == null)
-                {
-                    _pragma = new HttpHeaderValueCollection<NameValueHeaderValue>(KnownHeaders.Pragma.Descriptor, _parent);
-                }
-                return _pragma;
-            }
-        }
+        public HttpHeaderValueCollection<NameValueHeaderValue> Pragma =>
+            _pragma ??= new HttpHeaderValueCollection<NameValueHeaderValue>(KnownHeaders.Pragma.Descriptor, _parent);
 
-        public HttpHeaderValueCollection<string> Trailer
-        {
-            get
-            {
-                if (_trailer == null)
-                {
-                    _trailer = new HttpHeaderValueCollection<string>(KnownHeaders.Trailer.Descriptor, _parent);
-                }
-                return _trailer;
-            }
-        }
+        public HttpHeaderValueCollection<string> Trailer =>
+            _trailer ??= new HttpHeaderValueCollection<string>(KnownHeaders.Trailer.Descriptor, _parent);
 
         internal static bool? GetTransferEncodingChunked(HttpHeaders parent, HttpGeneralHeaders? headers)
         {
@@ -139,65 +120,20 @@ public bool? TransferEncodingChunked
             }
         }
 
-        public HttpHeaderValueCollection<ProductHeaderValue> Upgrade
-        {
-            get
-            {
-                if (_upgrade == null)
-                {
-                    _upgrade = new HttpHeaderValueCollection<ProductHeaderValue>(KnownHeaders.Upgrade.Descriptor, _parent);
-                }
-                return _upgrade;
-            }
-        }
+        public HttpHeaderValueCollection<ProductHeaderValue> Upgrade =>
+            _upgrade ??= new HttpHeaderValueCollection<ProductHeaderValue>(KnownHeaders.Upgrade.Descriptor, _parent);
 
-        public HttpHeaderValueCollection<ViaHeaderValue> Via
-        {
-            get
-            {
-                if (_via == null)
-                {
-                    _via = new HttpHeaderValueCollection<ViaHeaderValue>(KnownHeaders.Via.Descriptor, _parent);
-                }
-                return _via;
-            }
-        }
+        public HttpHeaderValueCollection<ViaHeaderValue> Via =>
+            _via ??= new HttpHeaderValueCollection<ViaHeaderValue>(KnownHeaders.Via.Descriptor, _parent);
 
-        public HttpHeaderValueCollection<WarningHeaderValue> Warning
-        {
-            get
-            {
-                if (_warning == null)
-                {
-                    _warning = new HttpHeaderValueCollection<WarningHeaderValue>(KnownHeaders.Warning.Descriptor, _parent);
-                }
-                return _warning;
-            }
-        }
+        public HttpHeaderValueCollection<WarningHeaderValue> Warning =>
+            _warning ??= new HttpHeaderValueCollection<WarningHeaderValue>(KnownHeaders.Warning.Descriptor, _parent);
 
-        public HttpHeaderValueCollection<string> Connection
-        {
-            get
-            {
-                if (_connection == null)
-                {
-                    _connection = new HttpHeaderValueCollection<string>(KnownHeaders.Connection.Descriptor, _parent);
-                }
-                return _connection;
-            }
-        }
+        public HttpHeaderValueCollection<string> Connection =>
+            _connection ??= new HttpHeaderValueCollection<string>(KnownHeaders.Connection.Descriptor, _parent);
 
-        public HttpHeaderValueCollection<TransferCodingHeaderValue> TransferEncoding
-        {
-            get
-            {
-                if (_transferEncoding == null)
-                {
-                    _transferEncoding = new HttpHeaderValueCollection<TransferCodingHeaderValue>(KnownHeaders.TransferEncoding.Descriptor, _parent);
-                }
-                return _transferEncoding;
-            }
-        }
+        public HttpHeaderValueCollection<TransferCodingHeaderValue> TransferEncoding =>
+            _transferEncoding ??= new HttpHeaderValueCollection<TransferCodingHeaderValue>(KnownHeaders.TransferEncoding.Descriptor, _parent);
 
         internal HttpGeneralHeaders(HttpHeaders parent)
         {