Determines whether the System.Web.Services.Protocols.SoapHeaderCollection contains a specific System.Web.Services.Protocols.SoapHeader.
- header
- The System.Web.Services.Protocols.SoapHeader to locate in the System.Web.Services.Protocols.SoapHeaderCollection.
true if the value of the header parameter is found in the System.Web.Services.Protocols.SoapHeaderCollection; otherwise, false.