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.
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true if the value of the header parameter is found in the System.Web.Services.Protocols.SoapHeaderCollection; otherwise, false.