ADO.NET :: Unable To Cast Object Of Type System.Guid To Type System.String?

Sep 17, 2010

[Code]....
System.InvalidCastException was unhandled by user code
Message=Unable to cast object of type 'System.Guid' to type 'System.String'.
Source=System.Data.Linq
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execut

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[Code]....

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[Code]....

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[code]....

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[Code]....

Column UserId = uniqueidentifier
Compilation Error
Description:
An error occurred during the compilation of a resource required to service
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Operator '==' cannot be applied to operands of type 'string' and
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[Code]....

Line 93:
Line 94: var creditcard = from c in db.tbl_Payments
Line 95: where UserID == c.UserId
Line 96: select c;
Line 97:

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