See return value in C#

Answer found here: VS get returned value in C# code?

It is actually visible. Debug + Other Windows + Registers. Look at the value of EAX (RAX in x64). The value of simple integral types are returned in the EAX register. Long in EDX:EAX. Floating point in STx (XMM00 in x64).

Assuming you are using visual studio, you could use the Immediate window. If you type Foo.Bar(); in the Immediate window you will get the result you are after, if you don't want it to re-evaluate stick a break point in the appropriate spot IE either before it evaluates the first time or in Foo.Bar() itself.