use the name of the header when throwing exception for invalid chars (#66250)

* use the name of the header when throwing exception for invalid chars

* delete VS code cleanups

* delete VS code cleanups 2

* add suggested changes 1

* delete VS code cleanups 3

* delete VS code cleanups 4

* delete VS code cleanups 5

Author: pedrobsaila

src/libraries/Common/src/System/Net/HttpValidationHelpers.cs

@@ -10,13 +10,13 @@ internal static string CheckBadHeaderNameChars(string name)
             // First, check for absence of separators and spaces.
             if (IsInvalidMethodOrHeaderString(name))
             {
-                throw new ArgumentException(SR.net_WebHeaderInvalidHeaderChars, nameof(name));
+                throw new ArgumentException(string.Format(SR.net_WebHeaderInvalidHeaderChars, name), nameof(name));
             }
 
             // Second, check for non CTL ASCII-7 characters (32-126).
             if (ContainsNonAsciiChars(name))
             {
-                throw new ArgumentException(SR.net_WebHeaderInvalidHeaderChars, nameof(name));
+                throw new ArgumentException(string.Format(SR.net_WebHeaderInvalidHeaderChars, name), nameof(name));
             }
             return name;
         }

src/libraries/System.Net.Http/src/Resources/Strings.resx

@@ -136,7 +136,7 @@
     <value>Cannot add value because header '{0}' does not support multiple values.</value>
   </data>
   <data name="net_http_headers_invalid_header_name" xml:space="preserve">
-    <value>The header name format is invalid.</value>
+    <value>The header name '{0}' has an invalid format.</value>
   </data>
   <data name="net_http_headers_invalid_value" xml:space="preserve">
     <value>The format of value '{0}' is invalid.</value>

src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpHeaders.cs

@@ -1046,7 +1046,7 @@ private HeaderDescriptor GetHeaderDescriptor(string name)
 
             if (!HeaderDescriptor.TryGet(name, out HeaderDescriptor descriptor))
             {
-                throw new FormatException(SR.net_http_headers_invalid_header_name);
+                throw new FormatException(string.Format(SR.net_http_headers_invalid_header_name, name));
             }
 
             if ((descriptor.HeaderType & _allowedHeaderTypes) != 0)

src/libraries/System.Net.Http/tests/UnitTests/Headers/HttpHeadersTest.cs

@@ -2359,6 +2359,13 @@ public void Add_LargeNumberOfHeaders_OperationsStillSupported(int numberOfHeader
             Assert.Equal(new[] { "newValue" }, valuesFor3);
         }
 
+        [Fact]
+        public void TryAddInvalidHeader_ShouldThrowFormatException()
+        {
+            MockHeaders headers = new MockHeaders();
+            AssertExtensions.ThrowsContains<FormatException>(() => headers.Remove("\u0080"), "\u0080");
+        }
+
         public static IEnumerable<object[]> NumberOfHeadersUpToArrayThreshold_AddNonValidated_EnumerateNonValidated()
         {
             for (int i = 0; i <= HttpHeaders.ArrayThreshold; i++)

src/libraries/System.Net.WebHeaderCollection/src/Resources/Strings.resx

@@ -71,7 +71,7 @@
     <value>Specified value has invalid CRLF characters.</value>
   </data>
   <data name="net_WebHeaderInvalidHeaderChars" xml:space="preserve">
-    <value>Specified value has invalid HTTP Header characters.</value>
+    <value>Specified value '{0}' has invalid HTTP Header characters.</value>
   </data>
   <data name="net_WebHeaderMissingColon" xml:space="preserve">
     <value>Specified value does not have a ':' separator.</value>

src/libraries/System.Net.WebHeaderCollection/tests/WebHeaderCollectionTest.cs

@@ -151,7 +151,8 @@ public void Setter_NullOrEmptyName_Throws(string name)
         public void Setter_InvalidName_Throws(string name)
         {
             WebHeaderCollection w = new WebHeaderCollection();
-            AssertExtensions.Throws<ArgumentException>("name", () => w[name] = "test");
+            ArgumentException exception = AssertExtensions.Throws<ArgumentException>("name", () => w[name] = "test");
+            Assert.Contains(name, exception.Message);
         }
 
         public static object[][] InvalidValues = {
@@ -234,7 +235,8 @@ public void Remove_NullOrEmptyHeader_ThrowsArgumentNullException(string name)
         public void Remove_InvalidHeader_ThrowsArgumentException(string name)
         {
             var headers = new WebHeaderCollection();
-            AssertExtensions.Throws<ArgumentException>("name", () => headers.Remove(name));
+            ArgumentException exception = AssertExtensions.Throws<ArgumentException>("name", () => headers.Remove(name));
+            Assert.Contains(name, exception.Message);
         }
 
         [Fact]
@@ -481,7 +483,12 @@ public void Add_NullName_ThrowsArgumentNullException()
         public void Add_InvalidName_ThrowsArgumentException(string name)
         {
             var headers = new WebHeaderCollection();
-            AssertExtensions.Throws<ArgumentException>("name", () => headers.Add(name, "value"));
+            ArgumentException exception = AssertExtensions.Throws<ArgumentException>("name", () => headers.Add(name, "value"));
+
+            if (!string.IsNullOrEmpty(name))
+            {
+                Assert.Contains(name, exception.Message);
+            }
         }
 
         [Theory]