Cannot convert lambda expression to type 'string' because it is not a delegate type

Question

In my controller i am trying to use include with EF4 to select related entities, but the lambda expression is throwing the following error,

i have the related entity de

Answer 1

If you are getting this error in Razor:

Ex:

@Html.RadioButtonFor(model => model.Security, "Fixed", new { @id = "securityFixed"})

C# doesn't know how to convert the string to valid bool or known type.

So change your string as below:

@Html.RadioButtonFor(model => model.Security, "True", new { @id = "securityFixed"}) 

or

@Html.RadioButtonFor(model => model.Security, "False", new { @id = "securityFixed"})