I'm trying this out usig ASP 2.0.
The public key part works ok but the private key request fails.

       CspParameters cspParams = new CspParameters();
       cspParams.Flags = CspProviderFlags.UseMachineKeyStore;
       RSACryptoServiceProvider rsa = new
RSACryptoServiceProvider(cspParams);
       rsa.PersistKeyInCsp = false;
       string publickey = rsa.ToXmlString(false);
       string privatekey = rsa.ToXmlString(true);

[SecurityException: Request for the permission of type
'System.Security.Permissions.KeyContainerPermission, mscorlib,
Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
failed.]
  System.Security.CodeAccessSecurityEngine.Check(Object demand,
StackCrawlMark& stackMark, Boolean isPermSet) +0
  System.Security.CodeAccessPermission.Demand() +59

System.Security.Cryptography.RSACryptoServiceProvider.ExportParameters(Boolean
includePrivateParameters) +120
  System.Security.Cryptography.RSA.ToXmlString(Boolean
includePrivateParameters) +41
  _Default.Button2_Click(Object sender, EventArgs e) +112
  System.EventHandler.Invoke(Object sender, EventArgs e) +0
  System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
  System.Web.UI.WebControls.Button.RaisePostBackEvent(String
eventArgument) +107

System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String
eventArgument) +7
  System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument) +11
  System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
+33
  System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+6953
  System.Web.UI.Page.ProcessRequest(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+154
  System.Web.UI.Page.ProcessRequest() +86
  System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
+18
  System.Web.UI.Page.ProcessRequest(HttpContext context) +49
  ASP.license_aspx.ProcessRequest(HttpContext context) in
App_Web_4boqwxxn.0.cs:0

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+154
  System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously) +64


Any leads?