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ContentType Class

Represents a MIME protocol Content-Type header.


Namespace:  System.Net.Mime
Assembly:  System (in System.dll)

public class ContentType

The ContentType type exposes the following members.

Public methodContentType()Initializes a new default instance of the ContentType class.
Public methodContentType(String)Initializes a new instance of the ContentType class using the specified string.

Public propertyBoundaryGets or sets the value of the boundary parameter included in the Content-Type header represented by this instance.
Public propertyCharSetGets or sets the value of the charset parameter included in the Content-Type header represented by this instance.
Public propertyMediaTypeGets or sets the media type value included in the Content-Type header represented by this instance.
Public propertyNameGets or sets the value of the name parameter included in the Content-Type header represented by this instance.
Public propertyParametersGets the dictionary that contains the parameters included in the Content-Type header represented by this instance.

Public methodEqualsDetermines whether the content-type header of the specified ContentType object is equal to the content-type header of this object. (Overrides Object.Equals(Object).)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeDetermines the hash code of the specified ContentType object (Overrides Object.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string representation of this ContentType object. (Overrides Object.ToString().)

The information in the ContentType class is used to describe the data contained in an e-mail message in such a way that software that displays e-mail can present the content in an appropriate manner. ContentType is used with the Attachment class to specify the type of content in the attachment.

The syntax of the Content-Type header is described in RFC 2045 Section 5.1. RFC 2046 provides detailed information about MIME media types and their parameters. These RFCs are available at

The following code example sends an e-mail message with an attachment and displays the ContentDisposition properties for the attachment.

		public static void CreateMessageWithAttachment(string server)
			// Specify the file to be attached and sent.
			// This example assumes that a file named Data.xls exists in the
			// current working directory.
			string file = "data.xls";
			// Create a message and set up the recipients.
			MailMessage message = new MailMessage(
			   "Quarterly data report.",
			   "See the attached spreadsheet.");

			// Create  the file attachment for this e-mail message.
			Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
			// Add time stamp information for the file.
			ContentDisposition disposition = data.ContentDisposition;
			disposition.CreationDate = System.IO.File.GetCreationTime(file);
			disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
			disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
			// Add the file attachment to this e-mail message.

			//Send the message.
			SmtpClient client = new SmtpClient(server);
			// Add credentials if the SMTP server requires them.
			client.Credentials = CredentialCache.DefaultNetworkCredentials;

      try {
			catch (Exception ex) {
			  Console.WriteLine("Exception caught in CreateMessageWithAttachment(): {0}", 
                    ex.ToString() );			  
			// Display the values in the ContentDisposition for the attachment.
			ContentDisposition cd = data.ContentDisposition;
			Console.WriteLine("Content disposition");
			Console.WriteLine("File {0}", cd.FileName);
			Console.WriteLine("Size {0}", cd.Size);
			Console.WriteLine("Creation {0}", cd.CreationDate);
			Console.WriteLine("Modification {0}", cd.ModificationDate);
			Console.WriteLine("Read {0}", cd.ReadDate);
			Console.WriteLine("Inline {0}", cd.Inline);
			Console.WriteLine("Parameters: {0}", cd.Parameters.Count);
			foreach (DictionaryEntry d in cd.Parameters)
				Console.WriteLine("{0} = {1}", d.Key, d.Value);

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.