What kind of media type does StringContent constructor support?

[chucklu]

StringContent(String, Encoding, String)
The third parameter is mediaType String
The media type to use for the content.

When I pass "application/base64" as the mediaType, I got the following error message.

new StringContent(fileContent, Encoding.UTF8, "application/base64")

The best overloaded method match for 'System.Net.Http.StringContent.StringContent(string, System.Text.Encoding, string)' has some invalid arguments
ExceptionType:Microsoft.CSharp.RuntimeBinder.RuntimeBinderException
Assembly:Anonymously Hosted DynamicMethods Assembly
Method:System.Net.Http.StringContent CallSite.Target(System.Runtime.CompilerServices.Closure, System.Runtime.CompilerServices.CallSite, System.Type, System.Object, System.Text.Encoding, System.String)

I find the media type from this page.
I am not sure if this class can support all media types.
I wonder if you guys can list how many media types are supported for StringContent's constructor.

[svick]

The error message talks about overload resolution, which means you're using dynamic and types of parameters you passed in couldn't be matched to any overload of the StringContent constructor.

I'm pretty sure this is because fileContent is not a string, which it has to be according to the method signature. This has nothing to do with the mediaType you used.

[chucklu]

@svick Thanks, I forgot to convert dynamic type to string.