Apply R# clean-up for reliability (#877)

* Apply R# clean-up for reliability

- Migrate to NUnit4 Assert.That
- Update dependencise versions
- Fix LangVersion to 9.0 (until net core migration)
- Reformat code
- Apply 'var' style (easier for refactoring)
- Remove redundant parentheses
- Add braces on every condition blocks (1 line)
- Uses new null checking patterns
- Uses AutoProperties when possible
- Uses string scalar type instead of class
- Clean usings
- Add .orig files in git ignore
- Rename some properties to respect defined conventions and US format definition
	- ID -> Id
	- BPM -> Bpm
	- Finish -> End

* Update R# settings according to the clean-up made

VocaluxeLib/Songs/CBaseNote.cs

@@ -41,7 +41,9 @@ namespace VocaluxeLib.Songs
             Duration = duration;
             Tone = tone;
             if (Duration < 1)
+            {
                 throw new Exception("Note to short. All notes should be at least 1 beat long!");
+            }
         }
         #endregion Constructors
 
@@ -62,7 +64,9 @@ namespace VocaluxeLib.Songs
             set
             {
                 if (value > 0)
+                {
                     _Duration = value;
+                }
             }
         }
 
@@ -72,13 +76,18 @@ namespace VocaluxeLib.Songs
             {
                 // Always return 0 for Rap notes
                 if (IsRapNote)
+                {
                     return 0;
+                }
+
                 return _Tone;
             }
             set
             {
-                if ((value >= CBase.Settings.GetToneMin()) && (value <= CBase.Settings.GetToneMax()))
+                if (value >= CBase.Settings.GetToneMin() && value <= CBase.Settings.GetToneMax())
+                {
                     _Tone = value;
+                }
             }
         }
 
@@ -104,4 +113,4 @@ namespace VocaluxeLib.Songs
         public abstract bool IsNoteType(params ENoteType[] noteTypes);
         #endregion Methods
     }
-}
+}