diff --git a/src/libraries/System.Net.Mail/ref/System.Net.Mail.cs b/src/libraries/System.Net.Mail/ref/System.Net.Mail.cs
index 6062637ecd4a4..c86ac55a79b3b 100644
--- a/src/libraries/System.Net.Mail/ref/System.Net.Mail.cs
+++ b/src/libraries/System.Net.Mail/ref/System.Net.Mail.cs
@@ -325,6 +325,7 @@ public static partial class MediaTypeNames
public static partial class Application
{
public const string FormUrlEncoded = "application/x-www-form-urlencoded";
+ public const string GZip = "application/gzip";
public const string Json = "application/json";
public const string JsonPatch = "application/json-patch+json";
public const string JsonSequence = "application/json-seq";
@@ -366,11 +367,14 @@ public static partial class Multipart
{
public const string ByteRanges = "multipart/byteranges";
public const string FormData = "multipart/form-data";
+ public const string Mixed = "multipart/mixed";
+ public const string Related = "multipart/related";
}
public static partial class Text
{
public const string Css = "text/css";
public const string Csv = "text/csv";
+ public const string EventStream = "text/event-stream";
public const string Html = "text/html";
public const string JavaScript = "text/javascript";
public const string Markdown = "text/markdown";
diff --git a/src/libraries/System.Net.Mail/src/System/Net/Mime/MediaTypeNames.cs b/src/libraries/System.Net.Mail/src/System/Net/Mime/MediaTypeNames.cs
index 859cd8e78d075..c7e43cba812cb 100644
--- a/src/libraries/System.Net.Mail/src/System/Net/Mime/MediaTypeNames.cs
+++ b/src/libraries/System.Net.Mail/src/System/Net/Mime/MediaTypeNames.cs
@@ -11,6 +11,9 @@ public static class Application
/// Specifies that the data consists of url-encoded key-value pairs.
public const string FormUrlEncoded = "application/x-www-form-urlencoded";
+ /// Specifies that the data is in gzip format.
+ public const string GZip = "application/gzip";
+
/// Specifies that the data is in JSON format.
public const string Json = "application/json";
@@ -118,6 +121,12 @@ public static class Multipart
/// Specifies that the data is in form data format.
public const string FormData = "multipart/form-data";
+
+ /// Specifies that the data is in mixed format.
+ public const string Mixed = "multipart/mixed";
+
+ /// Specifies that the data is in related format.
+ public const string Related = "multipart/related";
}
/// Specifies the kind of text data in an email message attachment.
@@ -129,6 +138,9 @@ public static class Text
/// Specifies that the data is in CSV format.
public const string Csv = "text/csv";
+ /// Specifies that the data is in event stream format.
+ public const string EventStream = "text/event-stream";
+
/// Specifies that the data is in HTML format.
public const string Html = "text/html";