c# - LINQ InvalidCastException error -

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i'm getting "invalidcastexception" (occurred in system.data.linq.dll) in function:

public user getuserbykey(guid key) {             return userstable.firstordefault(m => m.userkey == key); }

which called here:

membershipuser mu = membership.createuser(user.username, user.password, user.email, null, null, true, guid.newguid(), out status); user new_user = _usersrepository.getuserbykey((guid)mu.provideruserkey);

mu.provideruserkey guid object encapsulated in general object type should fine :/

thanks help!

since mentioned it's nvarchar(100) in comment earlier try this:

guid key = new guid(mu.provideruserkey.tostring()); // object string user new_user = _usersrepository.getuserbykey(key);

also, sql server has uniqueidentifier data type represent guid you may consider using.


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