Fix errors when uninstalling jQuery NuGet package.

src/AddIns/Misc/PackageManagement/Project/Src/EnvDTE/ProjectProperty.cs

@@ -25,13 +25,25 @@ namespace ICSharpCode.PackageManagement.EnvDTE
 			
 			if (IsTargetFrameworkMoniker(Name)) {
 				return GetTargetFrameworkMoniker();
+			} else if (IsFullPath(Name)) {
+				return GetFullPath();
 			}
 			return EmptyStringIfNull(value);
 		}
 		
 		bool IsTargetFrameworkMoniker(string name)
 		{
-			return String.Equals(name, "TargetFrameworkMoniker", StringComparison.InvariantCultureIgnoreCase);
+			return IsCaseInsensitiveMatch(name, "TargetFrameworkMoniker");
+		}
+		
+		bool IsFullPath(string name)
+		{
+			return IsCaseInsensitiveMatch(name, "FullPath");
+		}
+		
+		bool IsCaseInsensitiveMatch(string a, string b)
+		{
+			return String.Equals(a, b, StringComparison.InvariantCultureIgnoreCase);
 		}
 		
 		string GetTargetFrameworkMoniker()
@@ -44,6 +56,11 @@ namespace ICSharpCode.PackageManagement.EnvDTE
 			get { return project.MSBuildProject; }
 		}
 		
+		string GetFullPath()
+		{
+			return MSBuildProject.Directory;
+		}
+		
 		string EmptyStringIfNull(string value)
 		{
 			if (value != null) {

src/AddIns/Misc/PackageManagement/Test/Src/EnvDTE/ProjectPropertyTests.cs

@@ -126,5 +126,31 @@ namespace PackageManagement.Tests.EnvDTE
 			
 			Assert.AreEqual("4.0", targetFrameworkVersion);
 		}
+		
+		[Test]
+		public void Value_GetFullPathProperty_ReturnsProjectDirectory()
+		{
+			CreateProperties();
+			msbuildProject.FileName = @"d:\projects\MyProject\MyProject.csproj";
+			
+			Property fullPathProperty = project.Properties.Item("FullPath");
+			string fullPath = fullPathProperty.Value as string;
+			
+			string expectedFullPath = @"d:\projects\MyProject";
+			Assert.AreEqual(expectedFullPath, fullPath);
+		}
+		
+		[Test]
+		public void Value_GetFullPathPropertyWithUpperCaseCharacters_ReturnsProjectDirectory()
+		{
+			CreateProperties();
+			msbuildProject.FileName = @"d:\projects\MyProject\MyProject.csproj";
+			
+			Property fullPathProperty = project.Properties.Item("FULLPATH");
+			string fullPath = fullPathProperty.Value as string;
+			
+			string expectedFullPath = @"d:\projects\MyProject";
+			Assert.AreEqual(expectedFullPath, fullPath);
+		}
 	}
 }