I´m working with ASP.NET MVC and went through some code and the syntax below is new for me. Could someone explain me how it works?
ViewDataInfo vdi = viewData.GetViewDataInfo(expression); Func<object> modelAccessor = null; modelAccessor = () => vdi.Value; 
ViewDataInfo vdi = viewData.GetViewDataInfo(expression); Getting the result of the GetViewDataInfo method, called with parameter expression.
Func<object> modelAccessor = null; modelAccessor = () => vdi.Value; Creating and initializing the delegate (function pointer) in view of lambda function. When in future code you make a call modelAccessor(), it'll return vdi.Value.
() - this means the function retrieve no parameters.
Func<object> - the function will return an object.
vdi.Value - is the short variant of { return vdi.Value; }
Read more about the lambda-functions.
This line sets the ViewDataInfo to the vdi variable:
ViewDataInfo vdi = viewData.GetViewDataInfo(expression); This line initializes a null Func<object> delegate variable:
Func<object> modelAccessor = null; This line sets the Func to a lambda expression that returns the value of vdi:
modelAccessor = () => vdi.Value; Where the code below stands for an anonymous function that takes no parameter and returns an object (as specified in the generic type of the Func declaration):
() => vdi.Value 