qol: interpolated strings

Disco.Models/Repository/Device/Device.cs

@@ -73,7 +73,7 @@ namespace Disco.Models.Repository
         public override string ToString()
         {
             if (DeviceModel != null)
-                return string.Format("{0} - {1}", DeviceModel, SerialNumber);
+                return $"{DeviceModel} - {SerialNumber}";
             else
                 return SerialNumber;
         }

Disco.Models/Repository/Device/DeviceBatch.cs

@@ -55,7 +55,7 @@ namespace Disco.Models.Repository
         {
             if (string.IsNullOrWhiteSpace(Name))
             {
-                return string.Format("{0}: {1}", Id, PurchaseDate.ToLongDateString());
+                return $"{Id}: {PurchaseDate.ToLongDateString()}";
             }
             return Name;
         }

Disco.Models/Repository/Device/DeviceProfile.cs

@@ -52,7 +52,7 @@ namespace Disco.Models.Repository
             {
                 return Name;
             }
-            return string.Format("{0} ({1})", Name, ShortName);
+            return $"{Name} ({ShortName})";
         }
 
         [StringLength(200)]

Disco.Models/Repository/User/Flag/UserFlagAssignment.cs

@@ -38,7 +38,7 @@ namespace Disco.Models.Repository
 
         public override string ToString()
         {
-            return string.Format("User Flag Id: {0}; User Id: {1}; Added: {2:s}", UserFlagId, UserId, AddedDate);
+            return $"User Flag Id: {UserFlagId}; User Id: {UserId}; Added: {AddedDate:s}";
         }
     }
 }