Switched to netstandrad2.0.

Author: sdanyliv

NuGet/linq2db.EntityFrameworkCore.nuspec

@@ -14,7 +14,7 @@
 		<projectUrl>https://github.com/linq2db/linq2db.EntityFrameworkCore</projectUrl>
 		<license type="file">MIT-LICENSE.txt</license>
 		<dependencies>
-			<group targetFramework=".NETStandard2.1">
+			<group targetFramework=".NETStandard2.0">
 				<dependency id="Microsoft.EntityFrameworkCore.Relational" version="3.1.3" />
 				<dependency id="linq2db" version="3.0.0-preview.2" />
 			</group>

Source/LinqToDB.EntityFrameworkCore/EFCoreMetadataReader.cs

@@ -64,7 +64,7 @@ static bool CompareProperty(MemberInfo property, MemberInfo memberInfo)
 			if (property == memberInfo)
 				return true;
 
-			if (memberInfo.DeclaringType.IsAssignableFrom(property.DeclaringType) 
+			if (memberInfo.DeclaringType?.IsAssignableFrom(property.DeclaringType) == true
 			    && memberInfo.Name == property.Name 
 			    && memberInfo.MemberType == property.MemberType 
 			    && memberInfo.GetMemberType() == property.GetMemberType())
@@ -74,7 +74,8 @@ static bool CompareProperty(MemberInfo property, MemberInfo memberInfo)
 
 			return false;
 		}
-		
+
+		[System.Diagnostics.CodeAnalysis.SuppressMessage("Usage", "EF1001:Internal EF Core API usage.", Justification = "<Pending>")]
 		static bool CompareProperty(IProperty property, MemberInfo memberInfo)
 		{
 			return CompareProperty(property.GetIdentifyingMemberInfo(), memberInfo);

Source/LinqToDB.EntityFrameworkCore/LinqToDBForEFToolsImplDefault.cs

@@ -750,7 +750,7 @@ Expression LocalTransform(Expression e)
 
 									var propName = (string)EvaluateExpression(methodCall.Arguments[1]);
 									var param    = Expression.Parameter(methodCall.Method.GetGenericArguments()[0], "e");
-									var propPath = propName.Split('.', StringSplitOptions.RemoveEmptyEntries);
+									var propPath = propName.Split(new[] {'.'}, StringSplitOptions.RemoveEmptyEntries);
 									var prop     = (Expression)param;
 									for (int i = 0; i < propPath.Length; i++)
 									{

Source/LinqToDB.EntityFrameworkCore/linq2db.EntityFrameworkCore.csproj

@@ -3,7 +3,7 @@
 	<Import Project="..\..\Build\linq2db.Default.props" />
 
 	<PropertyGroup>
-		<TargetFramework>netstandard2.1</TargetFramework>
+		<TargetFramework>netstandard2.0</TargetFramework>
 		<RootNamespace>LinqToDB.EntityFrameworkCore</RootNamespace>
 		<DocumentationFile>bin\$(Configuration)\$(TargetFramework)\linq2db.EntityFrameworkCore.xml</DocumentationFile>
 	</PropertyGroup>