Combine paths in cross-platform style to allow Ef migrations in Linux

Author: gokhansengun

aspnet-core/src/AbpCompanyName.AbpProjectName.Core/Web/WebContentFolderHelper.cs

@@ -30,13 +30,13 @@ public static string CalculateContentRootFolder()
                 directoryInfo = directoryInfo.Parent;
             }
 
-            var webMvcFolder = Path.Combine(directoryInfo.FullName, @"src\AbpCompanyName.AbpProjectName.Web.Mvc");
+            var webMvcFolder = Path.Combine(directoryInfo.FullName, "src", "AbpCompanyName.AbpProjectName.Web.Mvc");
             if (Directory.Exists(webMvcFolder))
             {
                 return webMvcFolder;
             }
 
-            var webHostFolder = Path.Combine(directoryInfo.FullName, @"src\AbpCompanyName.AbpProjectName.Web.Host");
+            var webHostFolder = Path.Combine(directoryInfo.FullName, "src", "AbpCompanyName.AbpProjectName.Web.Host");
             if (Directory.Exists(webHostFolder))
             {
                 return webHostFolder;