Add initial sln and build related files

.editorconfig

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+root=true
+
+[*.cs]
+trim_trailing_whitespace=true
+insert_final_newline=true
+end_of_line = lf
+
+[*]
+charset = utf-8
+indent_style = tab
+indent_size = 4
+
+[*.cshtml]
+indent_style = tab
+indent_size = 4
+end_of_line = lf
+
+[*.{fs,fsx,yml}]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+
+[*.{md,markdown,json,js,csproj,fsproj,targets,targets,props}]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+
+# Dotnet code style settings:
+[*.{cs,vb}]
+
+# ---
+# naming conventions https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-naming-conventions
+# currently not supported in Rider/Resharper so not using these for now
+# ---
+
+# ---
+# langugage conventions https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference#language-conventions
+
+# Sort using and Import directives with System.* appearing first
+dotnet_sort_system_directives_first = true
+
+# Prefer this.X except for _fields
+# TODO can we force _ for private fields?
+# TODO elevate severity after code cleanup to warning minimum
+# TODO use language latest
+dotnet_style_qualification_for_field = false:error
+dotnet_style_qualification_for_property = false:error
+dotnet_style_qualification_for_method = false:error
+dotnet_style_qualification_for_event = false:error
+
+# Use language keywords instead of framework type names for type references
+dotnet_style_predefined_type_for_locals_parameters_members = true:error
+dotnet_style_predefined_type_for_member_access = true:error
+
+# Suggest more modern language features when available
+dotnet_style_object_initializer = true:error
+dotnet_style_collection_initializer = true:error
+dotnet_style_explicit_tuple_names = true:error
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:error
+dotnet_style_prefer_inferred_tuple_names = true:error
+dotnet_style_coalesce_expression = true:error
+dotnet_style_null_propagation = true:error
+
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:error
+dotnet_style_readonly_field = true:error
+
+# CSharp code style settings:
+[*.cs]
+# Prefer "var" everywhere
+csharp_style_var_for_built_in_types = true:error
+csharp_style_var_when_type_is_apparent = true:error
+csharp_style_var_elsewhere = true:error
+
+csharp_style_expression_bodied_methods = true:error
+csharp_style_expression_bodied_constructors = true:error
+csharp_style_expression_bodied_operators = true:error
+csharp_style_expression_bodied_properties = true:error
+csharp_style_expression_bodied_indexers = true:error
+csharp_style_expression_bodied_accessors = true:error
+
+# Suggest more modern language features when available
+csharp_style_pattern_matching_over_is_with_cast_check = true:error
+csharp_style_pattern_matching_over_as_with_null_check = true:error
+csharp_style_inlined_variable_declaration = true:error
+csharp_style_deconstructed_variable_declaration = true:error
+csharp_style_pattern_local_over_anonymous_function = true:error
+csharp_style_throw_expression = true:error
+csharp_style_conditional_delegate_call = true:error
+
+csharp_prefer_braces = false:warning
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:error
+
+# ---
+# formatting conventions https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference#formatting-conventions
+
+# Newline settings (Allman yo!)
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true:error
+csharp_new_line_before_catch = true:error
+csharp_new_line_before_finally = true:error
+csharp_new_line_before_members_in_object_initializers = true
+# just a suggestion do to our JSON tests that use anonymous types to 
+# represent json quite a bit (makes copy paste easier).
+csharp_new_line_before_members_in_anonymous_types = true:suggestion
+csharp_new_line_between_query_expression_clauses = true:error
+
+# Indent
+csharp_indent_case_contents = true:error
+csharp_indent_switch_labels = true:error
+csharp_space_after_cast = false:error
+csharp_space_after_keywords_in_control_flow_statements = true:error
+csharp_space_between_method_declaration_parameter_list_parentheses = false:error
+csharp_space_between_method_call_parameter_list_parentheses = false:error
+
+#Wrap
+csharp_preserve_single_line_statements = false:error
+csharp_preserve_single_line_blocks = true:error
+
+csharp_style_namespace_declarations = file_scoped
+
+# Resharper
+resharper_csharp_braces_for_lock=required_for_complex
+resharper_csharp_braces_for_using=required_for_complex
+resharper_csharp_braces_for_while=required_for_complex
+resharper_csharp_braces_for_foreach=required_for_complex
+resharper_csharp_braces_for_for=required_for_complex
+resharper_csharp_braces_for_fixed=required_for_complex
+resharper_csharp_braces_for_ifelse=required_for_complex
+
+resharper_csharp_accessor_owner_body=expression_body
+
+resharper_redundant_case_label_highlighting=do_not_show
+resharper_redundant_argument_default_value_highlighting=do_not_show
+# Do not penalize code that explicitly lists generic arguments
+resharper_redundant_type_arguments_of_method_highlighting=do_not_show
+
+[Jenkinsfile]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{sh,bat,ps1}]
+trim_trailing_whitespace=true
+insert_final_newline=true

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto eol=lf
+
+# Set default behavior for command prompt diff. 
+# This gives output on command line taking C# language constructs into consideration (e.g showing class name)
+*.cs text diff=csharp
+
+# Set windows specific files explicitly to crlf line ending
+*.cmd eol=crlf
+*.bat eol=crlf
+*.ps1 eol=crlf
+
+# Mark files specifically as binary to avoid line ending conversion
+*.snk binary
+*.png binary

.github/add-license-headers.sh

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+#!/bin/bash
+script_path=$(dirname $(realpath -s $0))/../
+
+function add_license () {
+    (find "$script_path" -name $1 | grep -v "/bin/" | grep -v "/obj/" )|while read fname; do
+        line=$(sed -n '2p;3q' "$fname")
+        if ! [[ "$line" == " * Licensed to Elasticsearch B.V. under one or more contributor" ]] ; then
+            cat "${script_path}.github/license-header.txt" "$fname" > "${fname}.new"
+            mv "${fname}.new" "$fname"
+        fi
+    done
+}
+
+add_license "*.cs"

.github/check-license-headers.sh

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+#!/usr/bin/env bash
+
+# Check that source code files in this repo have the appropriate license
+# header.
+
+if [ "$TRACE" != "" ]; then
+    export PS4='${BASH_SOURCE}:${LINENO}: ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
+    set -o xtrace
+fi
+set -o errexit
+set -o pipefail
+
+TOP=$(cd "$(dirname "$0")/.." >/dev/null && pwd)
+NLINES=$(wc -l .github/license-header.txt | awk '{print $1}')
+
+function check_license_header {
+    local f
+    f=$1
+    if ! diff .github/license-header.txt <(head -$NLINES "$f") >/dev/null; then
+        echo "check-license-headers: error: '$f' does not have required license header, see 'diff -u .github/license-header.txt <(head -$NLINES $f)'"
+        return 1
+    else
+        return 0
+    fi
+}
+
+cd "$TOP"
+nErrors=0
+for f in $(git ls-files | grep '\.cs$'); do
+    if ! check_license_header $f; then
+        nErrors=$((nErrors+1))
+    fi
+done
+
+for f in $(git ls-files | grep '\.fs$'); do
+    if ! check_license_header $f; then
+        nErrors=$((nErrors+1))
+    fi
+done
+
+if [[ $nErrors -eq 0 ]]; then
+    exit 0
+else
+    exit 1
+fi

.github/license-header.txt

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+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information

.github/workflows/ci.yml

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+name: Always be deploying
+
+on:
+  pull_request:
+    paths-ignore: 
+      - 'README.md'
+      - '.editorconfig'
+  push:
+    paths-ignore:
+      - 'README.md'
+      - '.editorconfig'
+    branches:
+      - main 
+    tags:
+      - "*.*.*"
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+    - run: |
+        git fetch --prune --unshallow --tags
+        echo exit code $?
+        git tag --list
+    - uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: | 
+          5.0.x
+          6.0.x
+        source-url: https://nuget.pkg.github.com/elastic/index.json
+      env:
+        NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+    - run: ./build.sh build -s true
+      name: Build
+    - run: ./build.sh test -s true
+      name: Test
+    - run: ./build.sh generatepackages -s true
+      name: Generate local nuget packages
+    - run: ./build.sh validatepackages -s true
+      name: "validate *.npkg files that were created"
+    - run: ./build.sh generateapichanges -s true
+      name: "Inspect public API changes"
+
+    - name: publish canary packages github package repository
+      if: github.event_name == 'push' && startswith(github.ref, 'refs/heads')
+      shell: bash
+      run:  |
+          until dotnet nuget push 'build/output/*.nupkg' -k ${{secrets.GITHUB_TOKEN}} --skip-duplicate --no-symbols; do echo "Retrying"; sleep 1; done;
+
+    # Github packages requires authentication, this is likely going away in the future so for now we publish to feedz.io
+    - run: dotnet nuget push 'build/output/*.nupkg' -k ${{secrets.FEEDZ_IO_API_KEY}} -s https://f.feedz.io/elastic/all/nuget/index.json --skip-duplicate --no-symbols
+      name: publish canary packages to feedz.io
+      if: github.event_name == 'push' && startswith(github.ref, 'refs/heads')
+
+    - run: ./build.sh generatereleasenotes -s true
+      name: Generate release notes for tag
+      if: github.event_name == 'push' && startswith(github.ref, 'refs/tags')
+    - run: ./build.sh createreleaseongithub -s true --token ${{secrets.GITHUB_TOKEN}}
+      if: github.event_name == 'push' && startswith(github.ref, 'refs/tags')
+      name: Create or update release for tag on github
+
+    - run: dotnet nuget push 'build/output/*.nupkg' -k ${{secrets.NUGET_ORG_API_KEY}} -s https://api.nuget.org/v3/index.json --skip-duplicate --no-symbols
+      name: release to nuget.org
+      if: github.event_name == 'push' && startswith(github.ref, 'refs/tags')

.github/workflows/license.yml

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+name: License headers
+
+on: [pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Check license headers
+      run: |
+        ./.github/check-license-headers.sh