getIssue returning data incompatible with MS .NET (complex objects )

if an issue is using custom fields, MS .NET xml parser will crash giving this error message Using V2:

Below the error message returned:

<b>The specified type was not recognized: name='string', namespace='http://schemas.xmlsoap.org/soap/encoding/', at <values xmlns=''>. </b>
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: The specified type was not recognized: name='string', namespace='http://schemas.xmlsoap.org/soap/encoding/', at <values xmlns=''>.
Source Error:
Line 184: [return: System.Xml.Serialization.SoapElementAttribute("getIssueReturn")]
Line 185: public RemoteIssue getIssue(string in0, string in1) {
Line 186: object[] results = this.Invoke("getIssue", new object[]

{ Line 187: in0, Line 188: in1}

);